I just have a feature request for you (unless the option exists, in which case I'm happy to be corrected ☺). It's small, but it would fix an annoyance.
Problem: Using the panels on the right side of the screen (editing, info, tags, comments), and then clicking into the Photos panel on the left closes the right panel. And vice versa.
Request: I'd really like to have the option to keep them both open to avoid having to re-orient each time one is closed and I have to open the other.
Context: I'm going through and organizing photos from All Photos and checking the info panel for a photo to see if it's been organized yet. If it hasn't been, or I organized it in the wrong place, I open up the Photos panel to drag and drop into the right album. Then I go back to the next picture, but the Info panel has collapsed. So I open it. Then I find another photo that needs to be organized, and I re-open the photo panel. Then I drag it over. Then I reopen the Info panel. Wash, rinse, repeat. Maybe for laptop use, it makes sense to only allow one to open at once, but I'd love the opportunity to have more context open at a time to optimize efficiency instead of having to re-orient and open/re-open various areas of the workspace over and over.