I completely get your point. That doesn't excuse bad playing.
Track would have been even more fun, had Browns playing been better.
I see it differently in the case of Squier who's playing was good but the sound may not be to everyones taste.
Again, I disagree. I think it would likely have been stiff with "better" playing. That's what others were doing at the time. Brown (both of them) went for a feel vs. textbook perfection.
Again, Squire's sound wasn't meant to be heard in isolation. I think his playing was great and groundbreaking. It made Roundabout.