The feel of the descent doesn’t bother me either. I just wish it was more. If you ever do a try out of Fulgaz or Rouvy you’ll definitely feel a difference. You really feel a 3% decline. Since the majority of the declines I regularly encounter in Zwift are 1-3%, I’d like to actually feel those kinds of percentages better.
It does seem like a strange artificial limitation that would be really easy for Zwift to adjust. If you set your wheelbase accurately in the Wahoo app like the instructions tell you too, you won’t hit your pedals against the ground unless you’ve got 250mm crank arms or something.