I working on a Recovery Tool for Moto X Style (EU) XT1572 from 7.0 back to 6.0.1 with working OTAs
No other factory img is needed anymore.
you want to be up to date? only OTAs needet for this ;)
The Recovery Tool bring you up to 6.0.1 without restriction.
First Beta Release: https://dl.prazaar.de/?dir=Android/Motorola/XT1572/Factory/Recovery-Tool