I get over to Bellagio a fair amount and I do love playing here. It's a great mix of players and it's just an epic place to play. One of the tops in Vegas.
Here are my gripes:
1 - It's cramped. I know it'll cost them money but it's no fun being on top of one another when playing. I'm sure they could figure that out somehow.
2 - Service can be a little slow. Understandable as busy as they are but you have to anticipate that.
3 - They do have a few people working the floor - dealers and staff alike - that can get on your nerves. Overall, they're very good but a bad apple can spoil it.
I think if Bellagio corrected this, they could come back on Aria but it's still a great place.