While the recently closed tab feature is something I am missing it's not that world ending.
On the other hand the thing that actually bothers me is that I used that button to show open tabs on other devices in simple manner.
Now I have to enable sidebar, click on tabs, click on device, click tab I want to open, disable sidebar. So instead of getting simple drop down menu and getting the tab I want in 2 clicks I have to go through loops and hoops from one side of screen to another like some demented hamster in his wheel.
So please, either revert or give us an option to enable additional button/s for tab explorer on device (in that drop down menu it was) and/or closed tab list.