Well, I'm further embarrassed to tell you I'm not even a Z2 Play user, though I seriously considered one a few weeks back due to dismal battery life collapse on my Moto Droid Turbo 2, which has a huge battery. After reading the same reviews you probably did of Z2 Play and Force Edition, I concluded Z2 Play would be the optimal choice on both cost and battery life, despite its battery size reduction. I'm not afraid of smaller batteries *if* overall power draw is better managed, esp. screen draw. (The 720p 2013 Droid Maxx was a brilliantly balanced design in this respect.)
Hopefully lack of battery discussions is a sign of high satisfaction with battery life on this new model. Since the very launch of the 2015 Droid Turbo 2 I have, there've been seemingly constant threads due to many owners not seeing anywhere near the Verizon and Moto touted numbers, e.g. <2 hrs screen time, while others loving life at 5+ hrs screen time. Nougat update seemed to drive many of us down even further. I've come to suspect the DT2 suffered a batch of bad original batteries, and/or a power draining bug in the radio software stack.
FWIW, I wound up having a $70 OEM battery replacement installed on my DT2, and now getting 14+ hour standby and 3 hour screen times far beyond any I had even when it was new, as measured by GSam Battery Monitor Pro. I'm a pretty heavy user, frequent Bluetooth, high power location services, Moto Voice enabled, etc.
I'm hopeful to hear that your two year newer Z2 Play sees even better numbers than those. Good luck!