I don't really know what Disney were thinking not having Robin Williams in the sequel, it's just maddness!!! He made the Genie what he was, he made Aladdin for that matter!!!
I can quote the Genie word for word in Aladdin!
This just wasn't as good, it could have been fantastic, the plot was there, the story. It's waaaay better than the third one (story wise) but you need Robin to bring the Genie's dialogue and personality up to scratch!
I've read about why he wasn't included in the second film and it was because Robin didn't want his (supporting) role to be marketed front and center (as he was the only known actor) which Disney went back on, plastering his image everywhere! Anyway Disney were the losers in the end. This had great potential and I still love it but it will never beat Aladdin!