I think your last point is a very interesting one. I don't know if it can be measured but I suspect the refereeing of games is much more even without fans there. I don't blame the refs there, it must be hard not to be influenced in some way.I think may a pundit would say the same thing for their team.....
For me it falls into I'd have accepted it if it was given, but can see reasons why it wasn't.
Probably a lot easier to not give decisions when you haven't got 70k fans on your back.
Saying all that, the sooner fans are back the better, safely obviously.