Okay. I've seen the problem. People are discouraged from alt-ing because of PA.
A toggle which can be changed ONCE PER-WEEK to select the character which will gain PA from the following:
-Probably something else I've forgotten
This means that you will still be able to get exp from regular mob killing and dungeon tokens. Raid tokens done on the non-PA toon will not be gained (maybe some sort of work around for this).
Put the toggle on the character select screen. And it you would have the option of picking which toon was able to gain PA for your account that week via the aforementioned quests etc.
Comments/suggestions to improve this are welcome.
How has nobody thought of this yet....