In the old days, we used to have a number when there were reviews that need to be done. I understand why that had to go. I'm not asking to bring it back. But one issue that I've noticed with myself, at least, is that I review a lot less than I used to before. I find that the current indicator isn't as much inviting as it used to be.
I suppose there needs to be a balance between how annoying and how inviting it should be.
This is how it currently looks like when there no reviews available.
And this is how it currently looks like when there's at least one queue that has reached the "upper threshold" (i.e. has the red dot instead of the grey one).
One very subtle proposition I have, in the second status, i.e. where there are reviews available, would it be possible to drop the checkmark from the icon and only show it when the reviews are all done?
I'm not saying this is the solution but just one idea that might have a small impact. I reason that checkmarks are usually linked to tasks that are done.
Ps. I'm not sure how the indicator looks when there reviews available, but none of them is red. But I suppose it's the same as the second screenshot, but it's a grey dot instead of a red one.
Disclaimer, this was prompted by a meta-question regarding the suggested edits queue on Ask Ubuntu. As I realised then how I had almost stopped reviewing compared to the early days.