im not saying it has to be an exact clone of TS. I just don't see any need for a gun on the apc. I find the gdi apc to be a very fun unit to play, even without the gun, just because its so good at squishing people. Plus, if you add a gun to the gdi apc, wouldn't you have to add one to the Nod counterpart as well?
I think my main gripe is that you'd be changing the look of an iconic tiberian sun unit, even if it is only slightly