Here are the 4* plus guys that have came here since Collins was hired. I'm using 247 fwiw.
Griffin
Myles Sims
Clayton
Ezzard
Gibbs
Jeff Sims
Brooks
Ivey
Ryan Johnson
Derrik Allen
With BlackStrain and Watson on the way (and the current class is likely to be more volatile in rankings compared to normal due to the limited opportunities to evaluate them). That's ~5-6 per year on average pace and that is also coming with, on average, higher rated three stars.
Collins was brought in under the premise of improved recruiting and he has done that (with the inclusions of transfers as well). The issue with that type of coaching change is that improved recruiting is a delayed benefit for the most part. For example, Collins had nothing to do with the Junior or senior class recruiting, and minimal to do with the sophomore class recruiting. We're seeing young guys making an impact early, and we're also seeing why having young guys make an impact early isn't always a good thing.
Going forward, Collins does need to turn the recruiting improvement into improved play, and we are improved from last year to this, and then turn that into even further improved recruiting. I don't expect Collins to get the most out of recruiting during these early few years. I do expect, should he have a 10+ win year or something, that leads to a further increased level of recruiting. That was one of the things I feel hurt Johnson, his inability to turn on the field success into greater recruiting success.