I think that AHA has come a good distance since the old MAAC days. I get that Niagara and its fans are disappointed that they have never been given a chance to compete in a Big 4 league. going Indy was not really much of an option, though. Just ask Huntsville how they enjoyed it. Now Niagara is in a bit better area for scheduling maybe, but once schools get into serious conference play, in February, getting a large number of them to play you is problematic at best, I suspect.
As for AHA schools wanting to leave, I have to question that. Niagara is probably the leader, followed by Mercyhurst, but I'm not convinced that Mercyhurst is all that willing outside the head coach. Probably everyone would consider it if their dream league came along with an offer. heck, UConn wasn't aggressively looking but couldn't say no when Hockey East called. Holy Cross would go to the ECAC if only to get to be seen in the company of the Ivy leaguers. Probably RIT would do that too, though to be considered equal to Colgate,Cornell, Clarkson and RPI rather than the Ivies. But I'm not sure that any of that means any of them would go to the WCHA. It's one thing to play Clarkson or Harvard all the time. It is quite another to play Alabama-Huntsville and Alaska-Fairbanks. I think only Niagara would be a sure bet to take that offer. Robert Morris is a definite maybe as is Mercyhurst.