I would also take another alternative: a new fire mode. Mode one same as before a bouncy nade Mode two a cannon ball with less AV damage and no splash but insta ragdoll on direct hit (this is a very important thing for attacking fortress maps and should not be removed) Mode three: a scatter shot replacing the mortar shot. It would be a high altitude canister shot that when detonates peppers a wide area with flakk doing 120-150 damage when hit. The aim would be tied to rolling mouse wheel to extend or shorten the firing arc.
Hmmmmm I kinda like the premise, makes it seem more like a Civil War cannon rather than a looted tank cannon. Would add a lot more utility to it, and give it some short-range punch with the scatter shot. In which case I'd ask for a smaller gun model instead of the giant thing we have now to represent the new gun.
I'd LOVE that! Seriously, I really would. But I'd also love to be able to wield it like the Ogre Lead Belchers from Warhammer as opposed to the over-the-shoulder that we have now. That's asking too much, but I'd still like it.