Originally Posted by Mambo Dave
No, I think you're right.
Evidence is in the tactics and routes that 1/2 to 1/4 of larger tier teams take that never get taken effectively on some of the maps they do play (or if they do take them, they're out of both contact with the enemy and radio range with their team for far too long). Tier 1's just don't need a lot, or many, maps, and for tier 1's or tier 2's there is map memorization that is aided by fewer maps. Let new guys learn those, then learn other maps in due time, because learning the nuances of each map (and each play style on each map) is about as important as anything in the game.
Playing "Mines" in a T1, or even the SU-26 is a whole hell of a lot different than playing the same map with Tigers and IS-3's.