Thank you @davidrasch @olf @remote - the article shades indeed some light on the improvements. I spotted only one new gesture though (apart from a vertical swipe instead of a horizontal swipe for changing screens):
However, I wonder whether the change from a horizontal swipe to a vertical swipe (just as in SFOS 1.0) has some implications on the in-app gestures because it allows for instance a gesture within the browser that lets you get back easier to a previous page (atm it is a bit incoonsistent with other apps like, for instance the file manager)
Maybe Jolla can borough some ideas from OMP …