Isn't any A2 profitable in the long-run? It may not feel like it when an ace his on the turn or river three times in a row, but it seems that limping any A2 is +EV from any position in the live games round here. I'd ususally throw away a bad A2 to a raise from a tight or normal player but that is about it.

If you can learn when to muck it, I expect you will find it remains profitable for you.