Based on ATM10 pack and progression should be mostly untouched by the pack.

1) Grains of Infinity

Fire crafting requires Fire Tick to be on. Our server had it disabled by default to prevent lag from forest fires (can be caused naturally) and protect structures from burning down. Game rules shouldn't stop you from playing a mod.
When using Deepslate, you often get failed crafts. Deepslate is not consumed, but you don't get grains either. It gets annoying that you have to keep lighting fires, and it results in a dud craft.

2) Capacitors.

Capacitors are cheap but requires too many sub-crafts due to nuggets. A better way to craft would be to use Ingots in the recipes and have multiple capacitors as a result. It would make all other crafts like machines and capacitor banks less painful.

3) Ensouled Chasis.

It requires you to craft chains and nuggets. The issue is that it is the base block for ensouled machines.
For example, to craft XP Obelisk, you need to perform the following steps:

1. Soularium Ingots in Alloy Smelter
2. Convert Ingots into nuggets (Crafting)
3. Convert Quartz to dust (SAG)
4. Craft Soul Chain using ingots, quartz and soularium dusts. (Crafting)
5. Then craft the soul chasis (Crafting)
6. And finally, you can go craft whatever block you want. In case of XP obelisk, you also need to craft XP rod. Other blocks need other materials like Alloys, Slicing, Soul binding or other materials like crafts.

Overall, you need minimum 6 or more steps to craft 1 block.
This is also completely ignoring the fact that you need a lot of resources to craft 1 block

4) Machine IO is slow compared to pipes.

For small setups like a smelter with a chest beside it, it can create a bottleneck.

5) Extra Output

Machines like SAG Mill produce extra output which doesn't necessarily is the same type as the main result. Since these share the same buffer as regular output and IOConfig doesn't distinguish between output types, any sort of automation requires filters on extract. This is doable using conduits, but not with machine IO. Even with conduits, the filter needs to be updated constantly depending on input.
Other Mods like Mekanism and Thermal solve this by allowing you to output secondary input to a different side.

New proposal for folks to consider (I'll action it if people like it)

We could kill the primitive alloy smelter and instead make the Stirling generator and alloy smelter accessible without alloys, removing this one use machine block.

New proposal for folks to consider (I'll action it if people like it)

We could kill the primitive alloy smelter and instead make the Stirling generator and alloy smelter accessible without alloys, removing this one use machine block.

I second this.
The primitive alloy smelter feels a bit like it's a remnant of older mod design concepts that have been phased out (imo because they're not great lol) -- the fact that dark steel can be found in chests is an implementation of the newer mod design concepts that replaced that (i.e. nonlinear entry gating). But I'm always for making entry gating less linear than it currently is

i haven't use it ever in over 10 years, so for me, for sure, it's useless! (sorry budd)

Yeah it was added as a way to bridge the requirement of dark steel for Stirling generator and alloy smelter, but adapting the recipe to avoid this is a lot more gameplay friendly, removing an almost single-use block which will be nice.

I do believe that the gamerule doFireTick has been supported since 1.12. Fire that is placed on bedrock will be checked to see if it is old enough, then manually removed, by these lines of code (I am pretty sure) however it may have broken in porting,

As for point 2, I agree, I find it annoying to have the extra nugget from crafting.

For point 4 yes it's hurrendous, i don't remember it like that from 1.7.10, in any case, it feels like it should be "ender" speed, if for balance consideration maybe better capacitor, better transfer rate ?

Loot capacitors: either get rid of the “energy consumption modifier” stat and widen the ranges of the capacitor stats, or add a means to reroll capacitor stats (or both). While it’s not terribly hard to find loot capacitors, it can be frustrating to get one with a high modifier but also a big energy consumption penalty when it’s also possible to get the same modifier with a bonus instead. I might be unusual/picky for disliking “feels bad” mechanics and randomly-applied penalties, but I figured I would still voice this.
Edit to add: I also second the motion to coarsen the granularity on recipes. I’ve always found nugget-using recipes irritating because of how there always seems to be an odd number of nuggets left over which ends up being a real drain on my storage space. Iron bars historically have less of a problem here because the division works out, but the fact that the least common denominator of iron ingots per void chassis (for example) comes out to 18 causes my OCD-addled brain a lot of anxiety lol.
(Specifically the chassis is 35/18 of an iron ingot in addition to the grains. That’s half a nugget shy of 2 to 1 which always ends up going to waste it feels like lololol)

Update on Point 4

In Ender IO 7.1.3 I have made it so that machine IO will now push up to an entire stack per slot each second. It still will only push a single machine slot per second, but I could raise that too depending on feedback for this change (it might be useful for something like a fast SAG mill), but I think this is a good first step :)

Update on Point 4

In Ender IO 7.1.3 I have made it so that machine IO will now push up to an entire stack per slot each second. It still will only push a single machine slot per second, but I could raise that too depending on feedback for this change (it might be useful for something like a fast SAG mill), but I think this is a good first step :)

Update again - after observing a SAG mill with an octadic capacitor, machine IO was still unable to cope with the byproducts. In 7.1.4 I've made it so that the entire inventory can be moved each second using machine I/O. This should be plenty sufficient for all factories now.

meka has made all this SO MUCH faster that i think this is a necessary change towards balancing that in most packs, good job!

Thoughts on point 5: not a direct solution but maybe a easier thing to implement, we could flip a switch to disable secondary output, potentialy get a boost in processing speed if toggled ? Random thought. Would, for those who want, remove the burden of the secondary items.