I personally think $2200 is reasonable for an AI, especially since airfare is so high now. I mean if i was going on vacay I wouldn't mind paything that much for it. But i know that may seem high to others. Our guests are spending that much to go to our wedding but only a couple of close friends and relatives are going to make it to our wedding (32 total). There were a lot of places that were more reasonabley priced that i thought were as nice or at least comparable to our choice but my fi had some PITA requests (like jacuzzi tubs in everyones rooms). Looking back on everything i wish i would of picked a place slightly cheaper like $2000 pp. i know it's only a couple hundred dollars difference but to a couple, that's $400 different.
Agreeing on a resort is the hardest thing you have to do. Don't get me wrong, the rest of the planning isn't all rainbows and sunshine. But the resort choice is just so stressful. I'm sure you could find a resort $2000 or under that's comparable to the one you have chosen. Keep an open mind when looking at resorts. Have you talked to a TA, maybe they can give you some suggestions. I think the suggestion to look into a resort complex like the Ruis or Gran Bahia, that has different priced rooms would be a really great compromise for you guys. Goodluck!