just my two cents, I really like the new lightweight UI used in the Dev version of Edge!
I was never fan of those additional Edge features like Tab preview, Set aside, Ink or Sharing right in the top bar, too many buttons for me. I can imagine some users used those features, but for me the new lightweight design is what I like.
If you plan to return these features into the new Edge as well, please, make it possible to turn off those features, possibly using settings or Flags. Less is sometimes more.