@tldrbro
Though your 7280 is Skylake CPU and similar to E7x70, you shouldn't use the patched DSDT/SSDT, hence the weird issues you're facing.
I'm still trying to figure out why using the E7x70 DSDT/SSDT, keyboard and trackpad works with PS2 kexts, but with 7280 DSDT/SSDT, they don't work. They require an I2C kexts but that's not supporting either. I'm trying to figure out how to disable the I2C and revert them to PS2 which is more supported.
Update:
I think I got it, but will need someone to test it