In a vacuum I might give it a 7 or an 8. I love Fifth Edition Classic, and New 5e is just a version of it which set out to be a little more needlessly complicated, a little less simulationist, a little less license to make it one's own, and a fair amount more homogeneous, all things I dislike, but had I come to it fresh without a nearly identical system I liked better that wouldn't amount to much.
But I'm giving New 5e a 3. I'm particularly unimpressed with what was produced, given how obvious all the positive changes were. But mostly I deeply resent that in order to continue freely playing with a wide number of 5e folk I had to buy new books then struggle through a new PHB where nearly everything was the same but worded slightly and subtly differently, and then there were snakes hiding in the grass of things that were completely different but had the same name, all so I can play a game I don't think is quite as good. 5e was already a game whose biggest flaw to me was the diminishing returns in terms of additional fun from the additional mastery which always seemed to be required, but I put in the hours mostly joyfully the first time around, this needless second time around I'm going to do it resentfully (or just not do it). I tried to get my new group to play Fifth Edition Classic, even brought a few extra copies of the PHB to our session zero in case anyone needed them, but there were brand new players and I really couldn't justify making them learn a system on its way out for my preference or convenience.
It's also full of "Look how they massacred my boy" moments of ruining things I was particularly fond of or had good 5e memories attached to like hybrid races, lycanthropy, the gloomstalker ranger dread ambusher ability, the Keen Mind feat, and the Sleep spell.
Just generally my gaming life is objectively a bit worse off for this edition existing. I put up with more complications and juggle more rules in my head to have a little less fun, and have spent about $150 for the privilege. So arguably I should give it some sort of negative score. But I'll be kind and stick with the 3.