Things like âchanged the fontâ and ânew viewâ and ânew sharing sidebarâ are all things youâll test by any kind of basic usage, but yeah, Iâll try and make a list of things-to-test for the next beta announcement, promise.
It was mostly a matter of âtoo little time, too much to doâ 
But the biggest changes are in UI refinements and sharing improvements. Much of the rest is very low level (hard to test specifically, other than just by using the app), or in apps. We talk about that later, not to give all the spoilers away