How easy is it to add some of the filters that were in the old version? Usually I care about titles but sometimes I want to lookup an old insightful comment (as some comments are as length and as thoughtful as the OPs). The search here seems to be a little more simplified than what many users here (well, i.e. "hacker" types who don't mind configuring their own searches) would need

Yeah, it is just ui/ux ; the core search speed is awesome.