What is so bad about the original Music Man guitars?

I had a funny thought of maybe picking up a 70s Music Man… just because. I’d like a 70s guitar, and it’s a lot cheaper than a 70s Tele (one of the few coveted 70s guitars, I guess). But I ran across an old vid of Sterling Ball saying how bad the original Stingray guitars were. I heard that Leo’s hearing was getting worse at this time and made his guitars too bright (I guess some G&Ls are similar). But can’t this be remedied with mods? Is there something about it that is simply “broken by design”?

On a sidenote, are there any notable artists who ever recorded with one?