I think it has to do with the lack of development and fundamentals more than anything. Last years team was more than capable and talented enough to win a regional. But when you can’t run bases, can’t get guys over and in with less than two outs, refuse to work counts or layoff breaking balls, when a starter is at 85 pitches in the 6th, you don’t win playoff/tournament games. And to your recruiting point, the talent wasn’t overwhelming enough to overcome that.
Overall I don’t think any team since 2008 was good enough to win it all, but plenty were good enough to do much better than they did (aside from the two years of no tourney that ended the streak. Those teams were god awful). You can’t be poorly coached and not talented enough.