I really dislike the combined Notifications/Avatar tab. First problem - I can’t access my profile without simultaneously clearing the notifications bubble, which I often don’t want to do.
Larger problem is that I use the Profile menu frequently on our own site to access my messages. Now, I have to go to my Profile page and tab through to Messages. On our site, where I’m a moderator, that would involve Enter, 27 x Tab and Enter again, instead of simply Tab, Enter as it stands at the moment.
I also use the Logout from the Profile menu whenever I leave the site (or Meta). The Logout button on the Profile page is not accessible by keyboard.
All in all, no win but a big loss, as far as I’m concerned.