It's awfully hard to argue numbers of what if, and in a way I dislike doing that because there are so many sides to any story with regards to that.
Pat was a trailblazer and a leader in WCBB for many years and when she got the gig in 1975 when she was only 22, WCBB wasn't even a NCAA sanctioned sport. She didn't really start dominating till the late 80's winning her first NC in 1987. From '87 to '98, she won 6 NC's. That 11-12 year period really were her best years. Sure she won 2 more with Parker in '07 and '08, but her best decade was the 90's.
Tenn fans will argue that UCONN wins not because Geno is the best coach or develops his players the best, but because he's the best recruiter. Obviously I disagree since there are many many examples of kids who were rated 20 or lower who ended up being terrifically developed for UCONN and even went on to have solid pro careers.
But my point is, to agree with Buzz in one sense, Pat never really focused on offense. She had the best athletes, played the best defense, and swamped the O-boards. She realized, IMHO, her shortcomings, which is why she famously went to Harry P for advice on how to run motion offense, among other things.
I do agree that focusing almost exclusively on defense does not work any more. Rutgers and Tennessee are two great examples. It remains to be seen how Tennessee adjusts to the changes we've seen in WCBB. There were times Geno was slow to adjust (not recruiting kids till they were juniors in HS for example) and it cost him for a few years. Now we will see how well Tenn can build for the future and if they will be relevant at the top of WCBB any time soon...