I agree with several of the points in this thread that NCAA tournament appearance (3 in 20 years; 15%) and beating VCU (9-25 record; 25% winning) are two very (arguably most) important markers of a successful season. However, I'm sure in the eyes of the administration, their criteria for a successful season is more nuanced than just making the NCAA tournament since only 19% (68/351) teams make the NCAA tournament every year or beating VCU as we also play around 30 other games in a season.
For instance, I would say, that last year, while disappointing in the end, was a successful year given we won an A10 regular season championship, were a 1 seed in the A10 tournament, and finished with a record of 23-10. The 2014-2015 season, we finished 21-14, were the 4 seed in A10 tournament, the 1 seed in NIT, & went to the NIT quarterfinals. In 2016-2017 season, we finished 22-13, were the 3 seed in the A10 tournament, and went to the NIT quarter finals. In 2019-2020, we were 24-7 and 2nd seed in A10 tournament and firmly in at-large bubble (though not guaranteed) vs. being in the NIT as a 1 or 2 seed. And of course we made the NCAA's in 2009-2010, 2010-2011, and 2021-2022.
So looking at it like that we have had "successful seasons" the following years since Mooney became coach: '10, '11, '15, '17, '20, '22, and '24. So that's a 7/19 seasons or ~37% successful season rate. Additionally, most coaches typically get a grace period of about 3-4 years when they first join a program to get in the recruits they want and implement their offensive/defensive scheme. So, not factoring in the first 4 years for Mooney (where it sounds like he started out without the full allotment of scholarship players) he could have what's seen by the administration as a 7/15 seasons or ~47% successful season rate equally spread out over 15 years. We have finished as a top 4 seed in the A10, 7 times since Mooney joined in the 2005-2006 season. Add all this to the fact that Mooney is a Princeton graduate, is a very nice person, has a good graduation rate with players, runs a clean program, represents the school well, and has had this level of success with likely harder recruiting restrictions for academic reasons, I can see why the administration is happy with the results despite the most glaring lack of NCAA tournament appearance and 25% win rate vs. VCU.
For me, looking forward is the most important thing. I don't know what has changed. Likely some combination of getting a practice facility, the loosening of academic restrictions, new assistant coaching staff perspectives, Mooney's change of coaching schemes (with defense), and the new NIL/portal era, but we've done very well the past several years and are getting the highest caliber of recruits we have ever gotten. Let's keep this momentum going.