Personally I hate the new changes because when I add some new road to an existing route on a very hard effort, and want to see how I did overall throughout the ride, I have to wade through all of these meaningless "first time" PRs to see which PRs actually reflect my best repeated effort on a given segment.

I do have some routes that I ride a lot where I hardly ever get any achievements, and that's fine. I put out a fairly hard effort a couple of days ago on a 32.5-mile route that I've ridden probably 60 times in the past, and that day's effort was in the top 10 in terms of overall average speed. I got exactly two achievements due to having gotten into the top 3 efforts for those two segments out of the 60+ prior rides. Totally cool with that. Getting 20-30 PRs because the group I rode with chose a parallel road to the one usually taken on a group ride that we've otherwise done before? Not cool at all. It really just floods the user with essentially meaningless junk that tells them nothing other than "congrats for riding this new segment."