One thing is for sure, that on the move threads, the options for the original threads will change. Currently when moving threads, you can leave the original, close it, mark it as moved or delete it.
Leaving and closing the original threads will actually have to go. Since 7.0 has been out, this hasn't ever really worked properly now that I look at it. Polls or file attachments can only be attached to a single post, and if you leave the original topic in tact, the poll or file is either going to belong to the original or the new/moved topic, it can't belong to both.
So bulk moving of topics is going to become just that, moving them from one location to another with no option to leave the original intact.
