To get rid of the annual cross-divisional rival games is to guarantee that several teams leave the ACC as soon as they get an invite. The list would start with FSU and Miami, and it would include Clemson and GT, as well as MooU.
There are certain things that must work and be promoted to make the expanded ACC, expanded even just to 12, work. Mess up those, derail those, and you make certain that the schools Mike Slive wants take time to listen carefully. And any known listening to the SEC will mean the Big Boring Ten starts flashing cash and the Big 12 gets interested in what's left.
The schools that are certain to be left out in such a doomsday scenario are the ones that need to see the oldest and biggest pictures that keep the ACC sea smooth and calm. If they start making nasty waves, they may cause those with good options to be happy about stormy seas.
ACC problems with an 8 game schedule cannot be dealt with save in the ways I've suggested without deeply angering several schools. The only way to over those problems is to have the NCAA rule on divisions be scrapped and the ACC move to no divisions, each team having 3 annual rivals.