This is starting to feel like the spatial disaster... a few developers suddenly think that they found the one true way of doing something and drive it through to completion, dismissing a lot of discussion along the way.
Then they discover that, while they solved their own problems perfectly, they have made life worse for most other Linux users. Then everything goes back to the way it was.
Betcha something similar happens here. I'm not worried though. Ubuntu is just over-correcting for Gnome's hideous notification system. They'll loosen up the design when they watch regular people trying to use it.