Yes, the prequel material was redeemed by the expanded content such as The Clone Wars, but the appreciation for the actual prequel trilogy either comes from a desire to ‘fix’ them in post or to enjoy them ironically. Revenge of the Sith is a good movie, but is endlessly quotable for the wrong reasons, sans maybe the Plageius speech at a stretch.
What few ST spin-off content we have had so far hasn’t been that great, noone’s worked out a meatier hook for Sequel content just yet, and some of the actors are currently in their “won’t do that again phase” of their careers, or have X-Pac Heat with the fans.
Right now, it’s understandable there is a desire for more OT content because that’s the least divisive of all the trilogies (unless you count the special editions), and we often barely scratched the surface of what it can offer, where as in the prequel’s case, I feel we’ve explored pretty much everything by this point.