Definitely keeping my X Pure. Does everything I need it to do and the 5X is a downgrade, to me anyway, and the 6P has little to make it 'better' then the Pure. I will never, never, buy any Android phone with less the 3GB of RAM. Yeah, it's stock Android but Android and memory leaks are pretty much best friends. 2GB just isn't enough these days, not unless Google got the memory issues really under control in M. The fingerprint sensor is not a huge issue for me, plus it's on the back of the phone. Moto Display is more useful for me since my phone is usually sitting on a desk and a fingerprint sensor on the back of the phone would save me no time unlocking the phone. I honestly would have a hard time having a phone without Moto Display at this point.
The 6P is pretty toe to toe with the X Pure but a fingerprint sensor, again on the back and not useful for me personally, a slightly bigger battery and LPDDR4 RAM instead of LPDDR3 isn't enough to get me to switch. It'll be a good month, it seems, to get the 6P and its's more expensive then the Pure. I may have to wait a few extra weeks to get software updates, at least big ones, but I'm ok with that.
Had I never gotten the Pure I might have been swayed by the 6P but I"m happy with the Pure.