I could be remembering this totally wrong, but I thought there was a time when there were stacks of close votes, first posts and late answers awaiting review. Then one day, when I noticed the review tool changed and a few new badges appearing, all the counts dropped to zero within a few days, where they seem to remain, with minor perturbations. (As an aside: is it just me or did the question count jump by 40k in just two or three months?)
I like the auto-queue format, but it makes me wonder about the quality of the review that's going on. It looks like limits were imposed to discourage too much streak reviewing, but now it looks like hardly any users are able to perform more than a handful of any given review type per day anyhow.
How can we adjust the system to balance rapid review with quality consideration?
EDIT: Here is one suggestion: How about bumping up the number of reviews needed to confirm an edit slightly? (I'm not even sure what it is now, nor am I sure what the average lifespan of a pending edit is.)