How bout some support weapons, support weapons can be used to assist the team in capturing intel or defending intel. Example: a mortar, its use can bombard enemies (or enemy positions) with a payload of mortar shells.
The downside: 2 people need to lug this thing and position it. Optional:(if you are killed or you abandoned the weapon the other team can capture it)
Id say 6 mortars would do (i mean it would be a pain in the ass if you keep getting bombarded by mortar teams trying to get intel or trying to escape with intel.

So how bout it?
(add more support weapons here)

Nothing new here. Move along, people

Its not like anyone has suggested this before...

eh. o well

I'd Very much like to see something like this done, and you could do a lot of cool things with terrain damage.