And the only UI change that has anything to do with multitasking is the ability to have more than 9 app covers on the home screen. So, in this regards, 2.0 is getting closer to proper multitasking, not "moving away from it". IOW, I have no idea what you are talking about.
To be honest, I was expecting more from 2.0. Not a different desktop, but a real change. For example, a complete refactoring with the primary focus on resource usage. For example I was expecting OOM disappearing completely or at least getting less frequent, not more.