Chances of this happening are virtually nil but I have thought that one major basketball-focused conference on the East Coast is best for the region. Basically, merge the basketball-oriented programs in the ACC with the C5 of the Big East and add in former Big East all sports member except for USF, Miami, Cincinnati, Rutgers, West Virginia and Louisville.

13 members, 8 of which play football.

UNC
UVA
Duke
Wake
Villanova
Georgetown
St. John's
Seton Hall
Providence
Pitt
Syracuse
Boston College
UConn

The football league would be:

UNC
UVA
Duke
Wake
Pitt
Syracuse
Boston College
UConn

This type of league would be best for their ambitions. They don't have to spend up for football, just have enough teams to fill in dates and then play opponents from the AAC, SEC, Big Ten, Notre Dame, PAC, Navy, Army, Air Force, leaving enough dates to play in-state or local rivals.

Lacrosse would be a separate new league that has the ACC stalwarts + Cuse, Notre Dame, St. John's, Villanova, Providence, Georgetown and Marquette. Perhaps then UConn would move up men's lacrosse to varsity.

What happens to the other sports of Marquette and Notre Dame? They would join a new sports league except for a few like hockey, lacrosse and football that is more regional in nature.

Notre Dame
Marquette
Xavier
Butler
St. Louis
DePaul
Creighton
Dayton

Btw, Miami, Florida State, Clemson, NC State, Virginia Tech and Louisville go to finish filling up the SEC slots.