The reason that isn't done is 1) bad tipping has some "demographic" components, and the companies don't want to be accused of discrimination, and 2) the driving company gets their fee regardless of whether the drivers get tipped. I road along with my son when he was doing this one summer, and you can see the trends fast. But knowing that your customer has been highly rated by other drivers would be huge.
Well, a qualitative rating like that would be better than the quantitative rating by percentages that you first mentioned. I personally wouldn’t want delivery drivers rating me at all, but I have never used one of these food delivery outfits anyway (and don’t plan to), so it doesn’t matter. I don’t think they’d come out here in any case.