For a while now, I've found the way reviews work currently very frustrating for both the end users and I believe also the developers. I don't mind that it's purely thumbs up or thumbs down unlike many other websites which use a spectrum system like stars, in fact I think it's overall good for the ecosystem.

What is not good however is what happens when you play a game that has potential but in it's current state has some glaring issue that you wish to bring to the attention of other potential buyers and even the game developer themselves. In such a case, I am hesitant to use either of the current options since I don't want to suggest either that you should buy the game nor that you should not, which is how I and many people see the review score signalling.

!Keep in mind! This is not just some symbolic nuance - the review score you give will directly impact the aggregate review score (positive, mixed, negative) which for most users often times serves as a filter for their decision on whether they should consider buying the game or not. Therefore, a game with a lot of potential that people otherwise love BUT that contains some currently unresolved bug or issue might get inadvertently review-bombed and lead the project to ruin.

Now Steam has already found a solution for this problem with the "informative" review score. But strangely, this is only available for the Steam Curators feature which I don't think affects the aggregate score and I'm unsure of how much of the userbase relies on curators as much as user reviews. Maybe since the user review section has worked one way for such a long time they didn't want to add the new feature but I personally feel this is such a needed feature for the core feedback ecosystem of Steam that it would be worth any adjustments needed.

To finish off, I would like to point out a real example of this happening recently (https://gtm.steamproxy.vip/id/eggg/recommended/2784470/). In this review, the user points out that they enjoy many aspects of the game but feel that the way the core gameplay is balanced at the time of review ruined the whole experience, and as a result of the current review options had to lean on a negatively tagged review instead of positive. The developer not long after responded to the review and thanked them for it, as constructive feedback is something every developer who wishes to make a great game needs. But many people in the replies were still frustrated by this since despite the review overall being constructive the red thumbs down flag added to it gave the impression that the reviewer was much more disapproving of the game than the actual content of the review suggests.