During the TP touch was always lagging behind the desktop development. It'll get there eventually. This OS is not supposed to be complete out of the box. They've released it in a state they are happy with, and then will update and add to it as time goes on.
@Pedrom You can rearrange tabs, you just drag it just as you would expect you would.
I agree on the action centre though. Way too big and doesn't do much. I couldn't really care about notifications, I only use it for the settings buttons. However for me the argument goes both ways, in that because I find no use for it, the size doesn't really bother me because it's never open. The action centre is not designed to be something open on the side though, so does it matter how much space it takes up? You're supposed to open it, attend to whatever actions windows would like you to attend to (clear all ) and then close it again.
In touch mode, you can't rearrange the tabs in Edge. At least I can't anyway. Works fine with a mouse.
Touch. Touch. Touch!
And my main gripe with the size of the Notification Centre is because of accidental launch. If I'm scrolling through a page with my thumb close to the right edge, then sometimes I accidentally catch the bezel and it opens. In 8.1, this wasn't a problem because it was so thin, when I tried scrolling again, it went away. This time, because it's so big, I have to close the Centre by touching somewhere else on the screen or swiping. It doesn't sound major, but it's really disruptive and annoying!
You say that during the TP the touch aspect was a little behind. Why do you make it sound like that's ok? Touch in 8.1 was damn near perfect for me. And that's my point. For touch devices, Windows 10 is a step back. For desktops, the leap from 7 to 10 is welcome, but not overly huge.
Too soon, MS. Too soon.
It's as if they saw no one liked 8.1 on desktop, had to 'innovate' to justify a new version which made it better again, and then launched it quickly - forgetting why they made 8 in the first place...for touch!