The problem with that approach to ask people, is the AFL don't want to know. Even if they decide to ask people why they aren't going, you might select crappy rules, or ticketing, or pricing etc and the AFL will default them all to Covid because thats not within their control.
Of the ones you said, I like 1, 2, (you can't count as you don't have a 3
), 7, 8, 9
I think umpiring interpretation will improve by making the game easier for them, instead of them thinking about this and that, it makes them focus on just individual things.
I'd add remove the in the back in the tackle ruling. So many times we see players pinned for HTB, yet they win a free for in the back for the most minor impact in the back. Its stupid, reward the tackle. If there is a forceful pushing forward in the tackle movement which could hurt someone (I assume this was brought in to protect players being smashed into the turf and breaking ribs etc), then add that to the dangerous tackle rule. Whilst we are on the dangerous tackle rule, they need to change this from "triggers" of a swinging motion, to one that may be swinging and could hurt an opponent. IMO its better to tackle and have them land face first on the turf as the arms etc are ouf and can protect the fall and protect the head and this is where the in the back interpretation is wrong, its actually forcing players to turn players in the tackle, and actually increase the opportunity for the head to hit the ground.