Not sure how to do that? The WeaponPickups seem to have a fixed respawn time.Yes I'd at least increase the respawn time by quite a bit.
Its why on Minus-KS I put it above 6, its wide out in the open, lots of chances for enemy team to kill you when you're trying to get it. But yes, having 2-3 players with instant build capability is pretty devastating.
So should it be changed that it does zero damage? Meaning it won't harm an enemy / enemy node (even if its building), meaning you'd have to start the node first, much like you do with link tanks? This would let you build fast a node you control, but you'd have kill the enemy node the old fashioned way first.