Review queues have been nothing but one big fiasco at SO. They are very difficult to get right and SO was never close to getting them working as intended. Then they tried to fix queues by adding more queues...

I agree that queues have generally been problematic, but in order for a system like this to be effective it has to hold the user back until an action is taken (a whitelist rather than blacklist approach), which in turn suggests prioritizing the opportunity for that action to be taken.

There are probably tweaks that could be made to address that; this is just a first cut at the idea.

In the past it was suggested that newer users would get a maximum question posting frequency. Perhaps that's a better fix? That's when we had lots of problems with certain users posting a whole lot of legitimate but low-quality questions, so that the whole front page of some sites was filled with down-voted bad questions with no answers. And that scares away other new users.

Well, I would also say that it's better if improvable questions can be improved (and the OP petitioned for improvements, where applicable) before exposure to up/down votes, but.

In principle we already support the suggestion, to my understanding: there are separate "Participate" and "Participate Everywhere" levels, which could have separate rate limits.