There are some really huge maps on the LWAs that I really don't like to fly in for more than an hour or two. Whenever that is the case, I take off for the MWA if there is more than 20 people on it, and it never lets me down. It's amazing what a difference a good map can make, even with a minute-fraction of the players that the LWA has.
I really don't like some of the huge maps on the LWA, and the worse part about them imo is that because they are so huge and nobody wants to put in more than one or two hours on them in a night/session, the same map stays up for days.
I'd be pretty happy though if the LWAs got some of the MWA's maps, or if the MWA started seeing player population numbers that are half of what you'd normaly find on the LWAs (though the later would probably negatively impact the great 1v1s that a lot of players are fond of in the MWA).