I'd say that any team that manages to do that deserves to win as it isn't exactly easy compared to camping a fixed spawn-location.I dunno, saw a few games where one team could have easily covered the map with AAs
Yea you can use deceptor plates to get by them without damage, but you have to tack on all 4 for it to be worth it
And given that you have loadout-variants it shouldn't be too hard to build one for an assault like that.
Once you've cleared them out you can drop in or use a supply depot to change back to something else.