My, my. As much as I want to be polite about this I think the header looks like something someone could create in paint in five minutes. The box on the left side especially that puts the logo into a block I find utterly visually unappealing. Also MagicalMeowe said, without the map there is a huge empty space which just looks ugly without anything.
Second of all, floating footers are a huge no. They are a nuisance and tend to get in the way of things. The bubbles are just as fine as they are for notifications not to mention footers tend to slow things down. I don't know about anyone else, but I have annoying lag time with the ones on Facebook alone and I have a decently fast connection. I doubt here will be any different if that change happens.
Although what I'm most annoyed about is that you seem to be deciding to do this before asking opinions from not only users but moderators and other people who actually use the system as well. Considering I've read multiple complaints about it hindering moderating abilities, I find it quite stupid that you don't simply take the time to ask at least them about it. You know, so they can do their jobs.
Overall, I really dislike this. Plus, don't you guys have a million other things that you could be fixing that aren't broken? (Homes, Jigsaw, Towns, etc? Must I go on?)