I'm trying to optimize the toolbars as we speak. There are 4 sizes of editors depending on the resolution of the screen the site is being viewed on. I'm doing my best to find a happy medium for all users.
The editor did change with the last forum software update to support responsive screens. Honestly, I didn't even know the "Preview" button was moved to the top... but that is the single button that I cannot relocate.
I'm also trying to keep the toolbars uniform across the different sized screens.