I know most people here won't agree but I like the way apple enforced multitasking. There really are apps that don't diserve an execution thread while backgrounded. The third party apps free the multitasking completley I think so I'll probably stick to the default way for starters and see how the battery behaves.

I dont mind the button, I don't like the fact that you have to press the screen for a few secs to be able to close multiple ones at a time. The red minus should be shown by default imho. I'm sure this will be adressed one way or another though.