I'm expecting chilledsanity to come and say Soldiers would kill all the SGs and Engies, to be honest
I don't know, but to me it looks like it would be a bit boring... I mean, the greatness of AvD is the pressure you have to put as O and hold as D. With a team full of Engineers, you can only wait until they come because your primary weapon can't move, and your best anti-cap weapon are the dispensers, which are destroyable...