That's the way those movies are meant to be seen.
On monday I had my first IMAX experience (the first IMAX in Argentina opened not long ago).
The rumble in my guts in the first big action scene... having to move the head to follow the action on the last one... really an intense cinematic experience.
I liked the second movie better, and everyone seemed a bit tired of their roles, but a fun movie.
If you are going to do popcorn, you better do great popcorn, and that's what Raimi does.