I actually like the Sith Trooper design, and precisely because of the similarity to the Phase II clone trooper helmet. Sadly they have such brief appearances (I believe there’s only two foreground shots of them in the entire movie) that they stand out more as a marketing gimmick (compared to, lets say…the death and shore troopers from Rogue One).

My design problem is mostly with the technicians, fighters and the Sith star destroyers (it’s clear they reused the CG model from Rogue One, despite it being the older iteration of ISDs in-universe).