I had the same reaction. It reads a bit like the UI engineers didn't have enough to do and stared at it until they found things to change. For instance, having

I had the same reaction. It reads a bit like the UI engineers didn't have enough to do and stared at it until they found things to change. For instance, having the tab visually disconnected to cue that you can rearrange it is fine... but at this point if a user doesn't know they can rearrange tabs, maybe they shouldn't be rearranging tabs.