I think for me, as I live down South, going to Prem games as a neutral is most likely. I'm not in the motherland enough to go see the Atlas team/wasps/Worcester RFC and couldn't really change my allegiance to a diff prem team, just wouldn't feel right.
For everyone else, it'll be interesting to see what people do, I think that the Wasps team will lack for support in Worcs, The Atlas team won't materialise and some may migrate across the road. Ultimately, the long term fans have lost their team, the younger fans may want to watch Wasps but who really knows at the moment.