yeah, I dont think anyone can get the wifi calling working on an AOSP ROM, if someone has done it in the past on CyanogenMod, and you can point me to there thread, I would take a look at it, but it will be low on my list.
The main thing I want o try to fix is the sensor, I need to put back the stock sensor and get it to work without all the lagging, I think it is an Selinux issue
then I want to get data working for non T-Mobile users, and maybe get the stock RIL files working
gonna be harder for me to test RIL / Data now, I just got an LG G4 and switched to Verizon yesterday, and I am pretty sure I can not use a Verizon SIM in this phone