I think the question should be, "Does the rest of the game need MORE XP?" It is obvious by the sheer number of players looking for exploits in the AE system, and by the huge influx of players back to the game when double XP is (sparingly) offered, that most players want to level faster. I think most players want to explore different ATs and builds and level them to 50 in an expedient manner, to optimize their CoH experience and "return on investment" (in time and money).
Maybe if the Devs adjusted the regular mission xp and rewards to match those offered through the AE system, and in double xp weekends, there would'nt be overcrowding in the Atlas AE buildings, we wouldn't have high level toons spamming the airwaves in Atlas looking for "Boss" teams, and we would once again have a more equal distribution of Players throughout the zones.
Just my two bits....