I personally loved FMA, the ending and all. Sure, it was pretty heartrending, but I think it worked. I have only now begun to read the manga, so I don't know exactly how or where the anime and manga diverged, but I imagine it should be pretty cool to have the anime in sync with the manga. That's always nice. Hopefully they just start from where it's different, it seems like a waste to redo the whole first half or so of the anime if it would be exactly the same story.