This is a nice little feature that makes playing for USF a little bit different. Moreover, weapon racks contribute to better timing, since USF retreat point (major) is very mobile. I see no problem here.
How major connecting with racks? You can't buy weapons from major. You buy are only from base. And 2-3 seconds wasted on road to racks, not big deal in game, because it's one time action. You will never again buy weapon for squad after it will get 2. And again, problem when racks are turn away from you, on a few maps racks in right places and it's not problem.