What Apple should do is consolidate all the notifications into the All tab, create a new tab named "Quick Action" and add the following options to it.
New Email
New Text
New Tweet
New Facebook Post
New Phone call (or add your phone favorites here)
and leave an API for devs to add more if needed.
Probably one of the better ideas I've heard. Three tabs would be fine:
Today
Notifications
Quick Action (or Widgets, Dashboard, whatever)
They just need to rename the UI from Notification Center to something else.