Things that are a proven fact:
WVU plays a tougher conference schedule now than it ever did in the Big East
WVU plays less games in conference vs sub-500 opponents than it ever did in the Big East
WVU plays more conference games vs top 50 RPI opponents than ever in the Big East
Our current conference puts a higher percentage of the conference teams in the NCAA Tournament (7/10) than the Big East did in its best year (2012) when it put 11 of 16 teams in the Dance
WVU plays more NCAA Tournament-level opponents in conference now than it ever did in the BE
The old Big East had tremendous depth, but the unbalanced schedule, and total ineptitude at the bottom (RU, SHU, PC, USF, SJU, and DePaul were comical pretty much year in and year out) is something that the Big XII doesnt have which I like. That said, even with some strong years out of the Big XII, the conference is still KU's property until someone knocks them off. Them winning it 12 years in a row is flat out embarrassing for the other programs in this league, and of all of the rest of the programs, if Im not mistaken were the only other school with a Final Four in the past 10 years, Texas and OK State had one each a little bit prior to that. So the strength at the top is lacking with this year being an outlier with OU showing some big time strength. I am 1000% certain that KU would never have sniffed 12 straight conference titles playing the likes of Syracuse, Georgetown, Villanova, Pitt, UConn, Cincy, Marquette, Notre Dame, and ourselves on an annual basis, way too much quality in the top half of the league for any single team to dominate for a decade+ straight.
I personally preferred the old Big East for hoops because most teams were driving distance and we had some type of history with most of the members, the Big East Tournament, and it wasnt a 1 team show, but I could see how some would prefer the Big XII with essentially 9 of 10 programs that are quality programs (the one outlier being TCU), making every game much more important opposed to the Big East where you can catch a 3 game stretch of snoozers vs Rutgers SHU and Providence over the course of 2 weeks.