For me, ATA had some of the best talent in large coed this year, and it just wasn't utilized as well as it could have been, so I'm more than excited that there will be some outside help to maybe help them along a bit, give them a routine that matches their skill level, etc.
I don't see any issue with gyms helping each other out in this manner, and I don't see why anyone bothers to waste their breath coming on here and saying it's an issue. If neither party feels it's a conflict on their part and both parties have agreed to it, why does it matter to anyone else if they're doing it?