This seems pretty easy to me. Other than Napheesa Collier (and sorta McBuckets), who else does Minny have that even approximates the talent of Stewie, Jonquel, Sabrina, and Sloot? Of course a super-team is going to be "one of the best of the last decade," even if your coach is just "meh."
Seeing how much improved Alanna Smith and Courtney Williams are in a single season is itself evidence of Reeves' coaching wizardry, whereas unfortunately I haven't actually seen any of the starting players from the Lib improve under Brondello's tutelage (maybe Laney-Hamilton, but she was already improving in NY before Sandy relocated). Maybe it's set against expectations, but I've not seen Sabrina consistently execute with the same effectiveness as she did her senior year at Oregon, and she's been in the W four seasons now.
And last point: rewatch the US-Australia Olympic semifinals. Probably the most one-sided performance by the US in the tournament, and a head-to-head matchup between Reeve and Brondello. Yes, we had the better players, but I didn't see anything Brondello did to limit their effectiveness or get us out of our groove, in a way that Belgium, France, and even Japan were able to do for stretches.