Plan “A”
The first plan will hinge on a few schools in the ACC to break up their annual rivalry with ND, to a 2 on-2 off schedule with them. It would also require the ACC to allow Notre Dame and Navy to go with an 8 game conference schedule.
You can re-align the divisions a little which I’d prefer, but to keep the illustration simple I used the existing set up and added Notre Dame and Navy. The divisions with the cross-divisions rivals will look like what you see below, then every 2 years ND and Navy will switch divisions.
The ACC can either remain at an 8 game conference schedule or the ACC (minus ND and Navy) can have a 9th, rotating game with the other division.
FSU / Miami
Clem / GT
BC / VT
Cuse / Pitt
UMd / UVA
NCSU / UNC
Wake / Duke
ND / Navy
Plan “B”
This one is very simple. Divisions are mostly aligned North and South with all the major rivalries kept in tact. The ACC would also need to go to an 8 game schedule for everybody.
FSU / Miami
Clem / BC
GT / ND
NCSU / UMd
UNC / Pitt
Wake / Navy
Duke / Cuse
UVA / VT
Notre Dame will now have 4 games to schedule with their other rivals Stanford, USC, Michigan, Michigan State, Purdue. I’m sure ND could make this work some how.
Navy would be football only which would mean the ACC would need to bring in another school for every thing else or just keep it with 15 basketball teams and since basketball does not have divisions, it can work with everybody playing 14 teams once and 4 others twice. Of course each school will have 1 or 2 permanent home and home rivals.
Baseball would not be a problem since Syracuse does not play baseball anyway and with Notre Dame it would actually make the baseball playing schools even with 14.