@Tonymitsu - Okay you want to have one set of gear for PvP and PvE. As for your drop-system to balance the time: Who says a raid-group is able to beat an encounter and is able to finish their quest?
As for your other point with game mechanics: I don't really see the problem, the benefits of expertise are capped. Yes a player without expertise will be utterly destroyed by someone with it. But that is the point of gearing up, is it not? With patch 1.2 you will be able to buy the champion gear with credits - so the difference between new 50s and old 50s will be smaller, at least in PvP.
Whaa, im way to slow at writing >.<