I think they've progressively gotten better, but not out of maturity, but because they've brought in better musicians. Not until they started star picking (Barker, Vortex, Galder) from other bands did I really respect their music. The original lead guitarist fucked up every solo when I saw them live and the original key boardist used a trigger for his arpeggios. That's not to say that their music was all together bad, in fact some if it was quite catchy. But for as much acclaim as they get, I was unimpressed with their live show.
I'm glad they've shed the corpse paint look (well almost completely anyway). I have a hard time respecting musicians that "dress up", whether it be corpse paint or armor or whatever.