If we get the Arizona schools and Colorado, we likely can have our pick at any other P12, MWC, or AAC school to reach a nice even number.
Even if the conference ends up with 18 or 20 schools. . . That is still an advantage. . . Especially if the ACC wants to snipe WVU, UCF, Cinci to also become a SUPER CONFERENCE. Due to reuniting with rivalries and the current ACC teams, I can see those teams would prefer the ACC.
Unlike the Pac 12, I think the ACC still has a good chance to snipe Big12 teams. (Pitt, Vtech games are important to WVU, UCF gets more Florida home recruits if they play the other local Florida teams.