Okay, I found something that actually works better in 5.10 than 5.09 or older: the JEI '+' button to populate the crafting table with a recipe actually works with GT meta-tools (although it only pulls enough to craft one item, even if I've got enough for more and shift+click the button). NEI couldn't do that, except for special variants like the AE2 crafting terminal. IDK yet whether it works with more advanced components like electric motors, pistons, etc. that gave even the AE2 crafting terminal trouble in 5.09.
Edit: finally found some tin so I could build a charcoal pile igniter (I have small ores disabled in WorldGeneration.cfg). I usually jump straight to the max size for the charcoal pile, but it's a bit annoying to place all the logs manually - I used to use a BuildCraft filler to handle that part, but that mod is only up to 1.8.9 and they're planning to jump to 1.11.2 next. Anybody know of something from another mod I could consider?