In my opinion the level 20 cap is a great decision.
And in an RPG, I don't think you should be allowed to max out everything.
If anything, I think they should make it much more difficult to get to level 20.
But there will likely be mods to increase the cap.
Yeh, my way of putting it is that an RPG is like life, where's the fun in being president, a lawyer, a doctor, a bum and a crack addict who steals from old ladys and can snipe headshots from 400 yards?....oh wait that would be amazing!..okay, lets try again
In life your never gonna be able to "max" everything so why would you want to be able to do it in an realistic RPG?
Realism, greatness, experience and pure enjoyment fades with God Mode turned on, simple.
How long did it take before Crackdown for the 360 got boring? yeh now weigh that out with Fallout 3.