I'm sure the ECAC east would be more than willing to let a few teams go from their current 14-team predicament. As long as they keep 7 D-III schools so they can keep the autobid they'd be happy.
What motivation would the new league have to let anyone in and jeopardize their potential cream puff auto bid? Likewise why would an ECAC East team want to take on that kind of insane travel schedule? Maybe a team like Salve or M'ville knowing it could mean an easier path to NCAAs but that then leads us back to my first question?