First off: I LOVE the menu customizaton options of the new viewer. I do, however, missed the docking option that the sidebar allowed for (I was pro-sidebar the moment it was introduced - I always hated the mess that the free floating windows can create). If they brought back an option to have your menu items docked OR free floating (not just free floating), I'd be a happy girl.
I also miss having the chat bar properly integrated in the bottom menu. I don't know where the heck to stick it now that it's free floating where it's not either awkward or blocking the text as it appears, but I suppose that's a minor quibble.
Seems like I just barely got used to the notifications being in the lower right (after months of them being there), and now they are at the top again, lol. Oh well. I will adjust.
(edited for silly typos)