I've been to the venue in Anaheim. It doesn't suck. On the contrary, it's incredible, miles ahead of the grubby ol' Sheraton LAX. Neighborhood is much nicer as well, across from Disneyland.
Everything about the Anaheim show seems better, timing, location, actual rooms, organization, etc.
Disney isn't a plus for me, but maybe for OOT families. The 5 is awful and you get Disneyland traffic on a weekend. Yay. It's also not very close to an airport.
As far as the back end stuff with vendors, I hope you are right.