I like the concept of the new UI; being able to remove all side bars and purely focus on content. However, it would be nice if we can still have a small button in the corner to switch between pages without the task of reopening all the side bars back on screen.

It would be ideal if we can choose where to place the toolbar whether at the top or bottom. Depending on certain screens and workflows, this could be useful and would seem more intuitive since the new ui gives a ‘floating’ appearance which would imply flexibility.