Hello, First of all, I think the new way with docstudio is the right path that ptc has taken. But like every time with new ways there need some additions. So here are the first addition from me,respectively my company.
Many users at my company uses the fatclient to fulfill there requirements. Now to use this review functionality they have to switch every time from client to docstudio. For me that is not a good usability. So at this time we need a possibility to display this comments and associated reviewers on fatclient. Because we have to use both until the fat client can replaced by docstudio.
I recommend it also to create or to have a road map to see which functionality from fatclient will transfer to docstudio. From my perspective this is big a change and we need more support from ptc to integrate this at our companies. Maybe it is possible to have a separated place (e.g. community) where we can vote which functionality should be in docstudio.