This is all conjecture at this point since we dont have one, but I suspect that the M8 will be more useful, and more used, than the M4A3 would. Mind you, I am not against having one, I think it would be great but I think its performance would be similar to the LVT4 if it had an AP round, IE, not all that great. The M4A8 with the 76mm might be an OK addition but the armor (even uparmored) is pretty pathetic.