You need to take off the rose-colored glasses and get a real prescription pair.
The best current WBB squad coming to the AAC is SMU, which has a lower RPI than ND, Cuse and LVille (going to ACC) and DePaul, Nova, St. John's and Marquette (going to NBE). The ACC also gets bottom feeder Pitt, while the NBE gets bottom feeders Hall and PeeCee. The net result is a bump up for both of those conferences while the AAC gets bumped down.
If all the OBE/AAC had been together in a 23-team conference, based on RPI the new AAC teams would have placed 10, 12, 14, 15, 16, 17, 18 and 20. There's no way that's not a major downgrade. Meantime the ACC is getting 1, 3, 6 and 23 while the NBE gets 4, 5, 7, 9, 11, 21 and 22. And 13 goes to the B1G.
Again, using current RPI you posted, the AAC in 2013-14 would be at .5373 and in 2014-15 it's .5307. At best that's 6th, but it's very likely the NBE will be better than that, bumping the AAC to 7th. I don't see any of the major conferences doing worse in the near term.
It's going to take some major wholesale changes in the programs of UCF, Houston, Temple, Tulane, Tulsa and ECU for AAC's conference RPI to get any better.