It seems the reviews tab in our profiles got an additional update - we can now also see all the games we've left a score (without a review) which is cool!

Would be nice to keep the two separate though, not clutter the actual reviews with plain ratings.

I agree. It takes more time now to actually see your reviews. I kinda feel like I want to delete some of my scores just to see the reviews the way I used to

There seems to be a new small issue with the GOG website that is caused by this new review system. Sometimes when I switch tabs in my browser, I see very briefly something fade away on the top of the game's store page. I managed to take a screenshot of it, and it appears to be multiple modal dialog boxes, all related to game reviews.

The best way to reproduce this issue is to open any game's store page in a new tab (the tab should load in the background) and then switch to the new tab (Ctrl + Tab seems to work best). And sometimes you should see the boxes fade away.

If you don't see the boxes fading away, switch to different tab, then reload the game's store page by right-clicking the tab in your browser's tab bar and using the menu option to reload the tab (so the store page reloads in the background), and then switching back to the new tab.

Edit: I should also mention that I'm using Firefox

Thanks for the good work so far!
What I still find missing in the reviews is the option to indicate whether you have completed the game and how difficult you found it.
This would allow you to set a filter for the approximate level of difficulty, which would be very helpful in some cases.

There are a lot of games I could feel that either circumstances are inapplicable to.

For example, OpenTTD has neither apply on account of being an infinite game and having very dynamic settings.

Good point.
But you can always add an option such as ‘undefined’ or something else...
You would have to test a little to see what makes sense.