Rushing to 50, not rushing to 50; it really doesn't matter, because once you get there it is going to come down to do you like grinding the rep eatables that must exist in MMO's for it to survive.
In DAoC, all there was to do at 50 was PvP but it was incredibly fun, yet in Warhammer with the same basic philosophy, the game sucked. This game will have the standard MMO end game choices and those that like what Bioware presents will stay. There will be plenty of things for folks to do, this game is pretty refined and loaded and set up for growth.