Mack was the NC of February! He got lazy in recruiting, taking only TX kids who were big names as Jrs. His commit list was almost always filled up by May of any year, irespective of what t a kid might do his senior year or whether the kid had peaked as a HS Jr. As a result, he signed way too many kids who had peaked as HS Jrs!
Strong is just too "no fun,old school", as Bill Mallory was when he was at CU (Buffs coulda had Don James instead---Crowder's other huge mistake---Chuckles being a solid No. 1!!!)
You are right about taking kids early. He took a lot of kids who were grown men at 16 and didn't develop much after. He also relied to much on his connections with the "big name" HS coaches. He got a lot of excellent kids but he also missed out on some kids who became stars at other schools.
They also got a lot of kids who were individually skilled but couldn't or wouldn't deal with not being "the" star.