"In Gnome Shell, we remove the title bar on maximization."
avl: I can understand why this is. I do have a small issue with it however: When you assign it to the left or right side of the screen (with windows-key + left/right arrow) in GNOME 3. It will detect it as maximized, disabling the title bar. However, if you have multiple tabs open, there is no space to double click somewhere to have it unmaximized. In maximized mode, there is some space next to the "new tab" + icon to to this.
The only way is to use a keyboard short cut again to return to unmaximized mode. This could be resolved by adding the same space next to the "new tab" + icon as in fullscreen maximized mode.