I was noticing that the method of tuning powered spawners is quite roundabout and i wanted to suggest a more modular system where broken spawners are crafted into a stable item that is inserted into the spawners inventory to serve as the tuning mechanism

additionally this would result in reusability because the tuning item can than be removed and placed into a soul binder to reset it. this would make the soul binder infinitely more useful and provide reuse-ability to the spawning system

currently there exists no method to recover or re-tune the broken spawner once placed inside a powered spawner and if you compare the spawning mechanics of EnderIO to MFR and DE you'll notice its excessively overcomplicated

in my opinion it's quiet right, because it spawns mobs from power only .. it does not need any mobessence like MFR, thus it's more "easy" to keep it running, but more complicated to setup

and for infinite use, why do you need infinite uses, make a powered spawner for each type of mob and make eitehr several rooms or build a contraption that is able to dismantle and replace it with another spawner

Overcomplicated? Or just not simple? Not allowing changing of the spawn target is very intentional.

Want to be able to change the target mob you're spawning? use MFR.
But first you'll have to kill a few enderman and a ghast, a few blazes, and have a couple emeralds.
not cheap. but you can change the "target" mob with a simple SFM program or with some computer craft tinkering. limiting the enderIO spawner to a single mob is, IMO a good way to keep things different and balanced. Also, having the [functionally] "same" machine from 3-4 mods in a modpack is---dumb.

I love the Ender IO spawners and how they work.
No Work Needed. I get plenty of Broken spawners from all over.
It was very easy to learn.