"4 Major teams are scheduled to go to the Dudley Major and 3 drop out. If Dan Smith had dropped out you are suddenly not going to call it a Major?"
I'd call it a conference event just like every other thing. You can call it a major all you want, but when two A teams play do they play by Major rules? No they don't, so calling it a major tourney makes absolutely zero sense just because major teams are in that tourney.
So sure its a Major* I guess....