Basically everything is still there, just arranged a little differently — do you think they factored in the public's aversion to change?
Now at the top of your Messenger home screen, you'll find new tabs for your Messages, groups and a tab showing everyone who's Active, which just reminds us of MSN Messenger.
The new bottom bar has tabs for Home, Calls, the Camera button, People and Games. When you have new activity in one of the sections or the tabs, you'll see a red dot letting you know to tap on the section or tab to check out the latest. For example, if you have a new, unseen message, you'll see a red dot next to Home along the bottom. Or, if you have a missed call, you'll see a red dot at the top next to Calls.