I too am running stock odexed DEV edition ROM...rooted...one mod (your back-button menu). Will one of the SystemUI mods work on my setup for your AT&T signal mods? Or would you need my SystemUI?
Also, will the same method used for creating the % battery mod work on the One's stock Odexed ROM (e.g., SystemUI decompile...xml edits...png files...recompile...like done on OneX or X+).
I'm torn at moving to a custom ROM yet as everything is working great...and my battery life is phenomenal! Are custom ROMs/Kernels getting better battery life?
From what I've read they're doing well - but I'm not having any issues with stock yet either. Today I went ahead and flashed a stock deodexed ROM just to make my life easier, but that's been it.
battery mods will work the same. Higher resolution means you'll want to use the new icons, as old icons stretched won't look really nice. I actually just finished adding numbers to 100 of the stock xxhdpi icons today (and changed my charging .xml a little) if you'd like them for your own mod, let me know.
I haven't been able to get the sweet script to work that you use for the blue themes, for some reason it just duplicates the folders and files and breaks the battery all together..