Are there any great fan sites out there with reviews of most of the supplements? Especially the later books?

The Order 66 Podcast has done in depth reviews of most (if not all) the books, often with at least one of the designers as guest hosts.

This isn't quite what you want, but in always looking for an excuse to bump this post.

https://community.fantasyflightgames.com/topic/222231-brief-adventure-module-reviews-ffg-weg-wotc/

I've always liked Cannibal Halfling Gaming's reviews. I can't find a way to search for a tag intersection of "star wars" and "review," but here's their Star Wars material: https://cannibalhalflinggaming.com/tag/star-wars/