Honestly there is very little about iOS 6 that is even remotely good. Most of the changes have made it much worse, and I'm die hard Apple fan lol. They simply don't have a good iOS team. They hardly add any features, and what they change just makes it much worse. I hope I'm not the only one who thinks the colored menu bars are not good lol, they are absolutely dreadfully terrible.
The fact that you can't swipe up from the bottom to reveal the multitasking bar makes me think they literally have no one intelligent working on ideas and features. I mean that is literally a no brainer. Swipe down from top for notification center, swipe up from bottom for multitasking. That should have been a minor feature added next to notification center in iOS 5, and now it is iOS 6 and they are still too incompetent to add that?
To add to that I think they should only display 4 apps in the multitasking bar, I'm not sure why you would need more than that displayed by swiping over. I believe when you open multitasking bar, 4 apps should be visible, and you can swipe right for volume/ipod/mute/rotation lock etc. and swipe left for frequently used settings to adjust them quickly, without having to open settings.