My list:
1. Re-instate "Batch Export" of sequences.
I agree. I often have to do this and really miss this feature. In a couple of weeks, I've got a project soon that is 10 1.5hr sequences with short turnaround. I'd like to batch 'em out overnight. For now, I'll just have to see how well the background exporting works.
2. Allow multiple tabbed sequences to be open at any given time. (All other NLE's have this).
Premiere doesn't allow more than one project open at a time which is a drag. I've never done multiple sequences with it like I would do in FCP Legacy. Does it tab them the same way?
With FCPX, you can click and hold on the back/forward arrows and it will drop down a list of your recent "projects"/sequences in order. Not as handy as tabs, but there.
3. Undo history and/or versioning made simpler.
Agreed.
4. Raw support for Arri/Sony/Canon etc.
As others have mentioned, this is something they're handing off to the manufacturers, though I suspect they're working with them at least somewhat.
5. SCROLLING TIMELINE!!!!
agreed.
6. Ability to turn off magnetic timeline, i.e. disabling snap to the left.
I hope you're not fighting against the very existence of the magnetic timeline because you'll lose that one. Apple isn't dumping it. If you mean on a temporary basis, there's the position tool (P). Many pixels have been spent on the Creative Cow forums on this topic, including workarounds/alternative workflows.
10.0.6 was a huge update and it resolved many of my basic feature requests. There are others, certainly, but I'm overall pleased.