I would expect it's changed and developed out of all proportion since 99 tbf, but can understand some (not necessarily you) could find it a bit overwhelming. Just found the various themed hotels fascinating, and with the shows and overall vibe of the place, it was just a great experience.
May or may not do it again, the doubt is just about the amount of walking involved so as to see as much as possible when we're not getting any younger. I'm a prime athlete natch, but thinking of the Mrs here.