Right now, there's some quests in the quest book that may lead you into doing something in a certain way that's not as efficient as the "main one", for example:

• Arsenic for QBits
• Wood gas for ethylene (should be mentioned that it's an extremely inefficient way)
• Titanium tetrachloride and air for polymerizing
• Naquadah Reactor Mk1 (debatable)
• Electrolyzing ender pearl dust for pulsating dust
• Reactor shown by the NC line
• Epoxy route not mentioning the superior allyl method

My idea is that these quests/mentions should be removed from the quest book, and instead added as a disclaimer on the "main" way.

This has been addressed in #665

I'm not sure if you're referring to the questbook as it appears in 1.2.2, or the development version. We have updated a number of quests already to fix certain shortcomings.

The quest book really isn't about telling you how to do things the One True Way™, but rather it gives you enough to get started. The NC reactor quest is a good example of this, we specifically inform the player that "This is a very basic reactor and can be changed to run faster and safer." Part of the fun of the pack is figuring out better routes and optimizing your infrastructure.

I also happen to disagree that some of your suggestions are more optimal routes. For example, it is never better to use Air over Oxygen for chemical reactions where you have a choice between the two (GTCE rewards the extra effort required to get pure Oxygen). Air is easy to obtain, but the quest doesn't even mention it because the player has already produced pure oxygen by then anyway.

TiCl4 as a catalyst is an option but whether it's worth exchanging some Titanium and Chlorine for more polymer output is situationally dependent. The quest mentions TiCl4 catalysts, but dissuades the player by telling them it's more valuable for Titanium in the near future.

Electrolyzing Ender Pearls for Pulsating Dust is unlocked at EV, whereas you can (and should) make pulsating dust through a cheap and infinitely renewable method long before that. Ender Pearl electrolysis might end up being a net loss in energy efficiency depending on how your existing infrastructure is set up.

I've been apprised that I misunderstood the nature of your suggestion. I read it as you were saying we promote inefficient routes and we should not do so and offer the better alternatives, whereas you were saying we should add information to dissuade from certain approaches.

With this understanding, I still mostly feel the same way. Part of the challenge of the pack is to figure out the best ways to do things and I don't want to spoon-feed everything; we give players the first ways they can go about certain things and leave optimizations as an exercise.

We really only warn about things players can do that have potentially disastrous consequences, like generating severe lag or causing AE2 crafting tree complexity explosion/failure.