Sounds OP but hear me out.
Imagine the bubble made of hexagon panels that can be shot out just as easily. Get a grenade in there and you destory the bubble completely and who ever is in there.
I feel like this is a good counter to a drop wall being ltierally one grenade or shot to the module and its completely gone, gives the equipment some longevity. When you consider how OP walking around literally invisible is, or an extra shield from and overshield. I feel like this could also be tuned and balanced to fit the sandbox better than the drop wall.
Either that or increase the drop walls panel strenght and module strength to survive a bit longer, it almost makes it pointless to use otherwise. Other than the MAYBE random boom block you get by just so happening to deploy it at the right time.