Thanks for letting us know! We’ll look into it. Rename for a single layer isn’t available, because renaming happens in the layer list, but there’s no reason it shouldn’t work for renaming multiple layers via the new multiple layer renaming interface.
I remember you’ve previously suggested in the forum, and it’s something we’d like to do, but just haven’t gotten around to doing. We’re currently improving our overlay system so we can more easily do on-canvas interactions such as these.