Difference was that in that era most freshman entering college weren't polished. In this era they are polished and Konate and Deidhou may not catch up to the skill level of the average entering freshman in 4 years because most of the kids entering college now have had professional coaching for 6-8 years. Successful coaches in this era are good recruiters, good game managers, understand how to use what they have, but not necessarily great teachers of the skills of the game. That's not a knock on Pitino. For example looking at Andre Hollins, he's maybe 5% better than he was as a freshman, but he was an impactful player as a freshman and gave us 4 good years, but it's not like he's so much better as a senior that he's totally transformed he's just a little smarter and a little better at picking his spots. He scored about 1/2 point per minute played for all 4 years, he just played a little less as a freshman. And that's not a knock on Tubby either. It's pretty rare league wide that players really get transformatively better in their 4 college years. That's part of why there is little reason to stick around once you have made yourself draft worthy.
Mo sucked as a freshman, he lost weight got faster and still sucks as a senior because the same skills he didn't have as a freshman haven't materialized 4 years later. A dietician and a lifting coach can't teach a 6'11" guy how to score from 2 ft away from the basket. No one taught Rodney Williams how to dribble in 4 years either, guys come in and leave with the same skills now, I'm convinced it's the way college ball is now. I used to think it was just the gophers but when you evaluate other teams it's the same deal. Look at Aaron White, good player, but he was a good player as a freshman and really doesn't look like he's more or less than he was then now.
With Diedhou and Konate you have the bare hope that they are on the steep part of the learning curve because they started so late. That's really a crap shoot, about the same odds as the lottery. World is full of tall athletic guys who started learning basketball but weren't able to progress skill wise to the next level. Good schools pass on those guys or offer them walk on deals. They don't tie up scholarships on guys who are totally unprepared to take the floor and play hoping that changes.