I am so happy that Apple decided to change the multi-tasking app closing gesture. I never cared for having to touch and hold on an icon waiting for the ‘X’ to appear. I much prefer the previous (and not current) way which is to swipe up to close.
I am hoping they realized that you cannot change a convention once it is that set in peoples minds without causing major frustrations.
There are numerous other changes in the new Beta 3, I am running it on my iPad Pro 12” and have been very happy with all the Beta releases so far, for me at least, they have been stable enough to use daily.