I get where hermie is coming from. I go back and forth on this. I think there are a few coaches who are great at preparing game plans, making adjustments, and adapting to the strengths of their roster. Groce is not one of them, but I don't think that's a deal breaker; even the best coaches will struggle to win consistently on the basis of X's and O's if they're at a talent disadvantage. There are other coaches who run systems that allow them to compete with lesser talent (usually pace-dictating schemes - slowdown offense, WVU press, etc.). Groce runs a generic system without many imaginative wrinkles. Doesn't bother me, as it's one that's supported by plenty of good basketball minds and analytics models.
At the end of the day, I think that being a strategy whiz and tactical savant is overrated at the college level. I think that Groce is a below-average basketball mind relative to his B1G peers, but I don't think it matters a ton. In the college game, talent wins. This is especially true when you get talented kids in the program for multiple years, so they learn how to play technically sound defense, understand your philosophy, and develop a comfort level with each other.
I think that Groce is a good enough coach and leader of men to win with a deep, talented, experienced roster. Sure, in a vacuum I'd rather have Archie Miller or a few dozen other coaches, but the way Groce's recruiting has ticked up and considering the surfeit of downstate talent the next few years, the question is at least worth asking: if we win 19 games and miss the tourney this year, are we more likely to rebound as a program with Groce on the bench and potentially a roster that's loaded with 4-stars, plus 5-star guys like Tilmon and (maybe) Dosunmu and Okoro, or are we better off gambling on a promising up-and-coming coach but potentially losing Tilmon, Frazier, maybe JCL, and who knows what other players/recruits/relationships? I'm not saying there's not a right answer--I personally feel that if JG doesn't turn it around this year he's got to go--but the possible ramifications are disconcerting.