I think the solution is to accept that it is inherently flawed (I would not say this if it was inherently blatantly unfair, but that's not the same thing). I've said this recently but will repeat here, adding mandatory restrictions, even with good intentions, will simply cause fewer people to review, and lowering quantity is not equal to increasing the quality per review.
Also, changing the system is frustrating because of the lost context of the reviews made before the change. Better be very sure of the replacement system or else it'll get replaced again over and over. While flawed, the current system has consistency going for it.
I like your suggestion
@Murikamir but ultimately I think I have to agree with addiesin; just because the system is "flawed" at its core, that doesn't make it worthless or in need of change. The differences between 7s and 8s, 9s and 10s, are all going to be the result of some extreme subjectivity that is dependent on what each individual viewer is expecting to get out of the experience, and that's perfectly fine. The bottom line is: there is no such thing as a "Perfect" piece of art
for everyone.
The way each edit is rated overall is a culmination of very different, very subjective reviews. Just because an edit has 10 reviews and has a perfect 10/10 doesn't mean you're going to watch it and agree what it's the absolute best edit you've ever seen,
but I think after most people peruse through the edit page, find one that seems interesting, see the score, and read the changes log, they're going to be able to make a fairly accurate judgment call about whether they're going to enjoy the project.
One way or another you're going to have some people give you 10s, some people give you 7s and some people give you 4s. And while sure, it sucks to see something you made get a lower score than you feel it deserves, but in the end if you made something worthy of being watched and appreciated, I think that will be reflected in the numbers. Everyone and everything in the world of Art is subjective, but the rating system we have in place here gives people a quantifiable way to get a rough estimate of the quality they should expect when they decide to give an edit a watch. And in my opinion, that's all we could really ask for out of a rating system.