When you look around at the major conferences, for most of their history they have been dominated by one or two teams. And Uconn because it has been the most consistent team in the history of WCBB on a game by game basis for the last 20+ years makes whatever league it plays in look worse than it really is. Baylor has dominated the Big 12, Stanford dominated the Pac10, Ohio State dominated the Big10, Duke dominated the ACC and then ND, and TN and now SC have dominated the SEC. Texas I believe still owns the conference consecutive win total. But all of those teams consistently through in really bad games consistently every year, Uconn does not. Not sure what the other teams record win streaks are against unranked teams but Uconn has two 100+ win streaks, and their record against non-top 10 is probably pretty incredible as well.
Baylor lost to UCLA this year, Lousiville to FSU, MsSt to SC, TX to TN. Of the top 10 the only team with no bad losses is ND who lost twice to Louisville and once to Uconn. Those types of bad losses almost never appear on Uconn's record - Stanford 3 years ago is the last one, and previous to that ... St. John's ? Again ND comes closest to that kind of consistency but remains a distant second.
To the OP - yeah the early Big East was pretty weak, and really that period stretches well into the 2000s, ND after their NC in 2001 disappeared for years replaced by Rutgers for a few years as a national power which is not that far off the USF Uconn dynamic. I think the biggest difference between then and now is the national landscape which is much stronger than it was - more leagues while still dominated by one team have two or three or more other solid teams so a league with only two viable teams stands out as weaker than it would have in 2000 or 1995. And there are indications of a few more teams in the AAC beginning to emerge.
NB Uconn has now had 10 TEN! undefeated regular seasons - not sure if even TN has more than a couple. Think about that! We take it as the norm other teams dream about getting one season like that.