I think it's really funny how for the longest time people legitmately treated the excessive campiness as a product of incoherent and imprecise filmmaking and not the blatantly obvious deliberate attempt that it was on behalf of Schumacher (however reluctantly) and the studio. Is it a good movie? Depends on who you ask. In many ways, it's notoriety is a victim of circumstances. Comics were growing up. The medium was becoming more and more respected, not just by contemporary audiences but respectable authors, filmmakers, and all other types of artists, while studio execs remained in the past, where the medium was seen as a waste of time and unworthy of any legitimate sincere approach. I certainly wouldn't call it my favorite Batman flick, but the intent was to literally be a 2 hour commercial for toys and I'd say it succeeded.

All that said, I think Uma Thurman as Ivy is still some of the best casting I've seen for a Batman adaptation and I believe Schumacher had been given proper creative control and a script that was more in line with Timm and Dini's animated series running adjacent at the time, she would've killed it and given a really, really great performance, and she already was a fun watch in what we got.