I don't like the new submenu for `move tab to new group`, it reduces discoverability. I use tab groups more often than `move tab to incognito window` so I would prefer to see all the tab groups options as first level items. (ideally there should be a way to chose what appears as top level or sub-menu).
tab groups : since it's now a sub-menu, it's a bit awkward to use when the tab is at the rightmost : the submenu will popout on the left of the tab menu, you need to drag the mouse around the menu
once a tab group has been created, there is a missing space between `move tab to` and the group name (see pic)