Earlier quoted context omitted.
I've been using Ubuntu with Gnome on Wayland for the past year or so on my Dell XPS 13. I actually ended up switching to Wayland, because of how much better the touchpad worked with it. To be fair though, Dell has an entire team dedicated to supporting the XPS 13 Developer Edition, so the drivers are highly curated compared to most devices.
My experience was on an XPS 9570, not sure if there's a large gap in driver / support. Out of the box synaptics was pretty bad, but after tuning the palm detection zone size and a couple timings (long press, etc) it feels amazing. When I don't have to test convoluted UIs, I can go days without plugging the mouse. Don't you have the small "lag" when two fingers scrolling?
Are you referring to this bug[1] in Chromium? I think these are growing pains associated with transitioning to Wayland, but this really doesn't bother me too much. I will say that the scrolling is otherwise very smooth and almost perfectly everywhere else in the UX.
[1]https://bugs.chromium.org/p/chromium/issues/detail?id=712737