That is a complaint heard in the MWO forums as well. "Too quick", and "too constricted".
The addition of larger maps is supposed to help with that and evidently there are some maps in the works that will dwarf the current maps.
There is a new bit of info about what is coming in the game for February. One of the new items is a much larger map called Alpine. The other new thing is another medium mech, the Trebuchet.
I'm more interested in the other two things that are further out in their plans.
1. Dropship mode. This is a game mode where you have 4 lives per game, 1 per each weight class I believe. You drop in from your dropship after you die in one of the other mechs in your lineup. If you don't have a mech from a weight class, they have 1 "trial" mech per weight class available each month for you to play with.
2. Community warfare. This is a meta game set on the star map of the Inner Sphere. You pick planets and fight over them. If you win the player vs player games, then that planet switches hands to your faction.