I'll pull the boot.img from the OTA. That *should* get the touch screen working properly. If it doesn't, I'll S-ON my device, unlock again, take the OTA, and see what I can come up with as a solution.
EDIT: boot.img attached (it's in the zip). If you're unlocked, you should be able to either fastboot the img in the zip file, or rename the entire zip to just PJ75IMG.zip and flash through HBOOT.
EDIT 2: Also, if you need a different 3.16 ROM to flash, that'll work with TWRP 2.4.1.0, you can try mine from here: ]
EDIT 3: Ok, well I can confirm that with TWRP 2.4.1.0, after flashing the new touch panel image, I'm unable to flash either of my ROMs either. Now to try a ROM based on the 3.15 (Viper4G), and see if I can use that along with the signed boot.img

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EDIT 4: The AROMA installer does show up in a weird color in this latest TWRP, but the ROM does appear to have flashed successfully (I assume restoring a nandroid would work too). Touch screen unresponsive on initial boot, but after fastbooting the boot.img from my stock rooted ROM, I can navigate (the one from this post should work also).