I posted some general information about the status of metadata work here:
Long story short, there’s a lot of work happening right now to get to the bottom of some long-standing issues, and the fixes frequently touch thousands of albums or more. We do not roll out changes like that without taking time to carefully and methodically verify them, and that work is in progress as well.
The frustrating part for all of us is that it gives the appearance that nothing is happening, but nothing could be further from the truth, and I’m sure @joel will be giving everyone updates as he prepares to put the first big round of fixes live. If these missing reviews were easy to fix, we would’ve done it long ago 