I have gone back to syncing with Dropbox after experimenting with iCloud. I noticed that there is a remaining folder on my Mac at ~/Library/Mobile Documents/2BUA8C4S2C~com~agilebits~onepassword
Is it safe to delete this folder on my Mac?
It probably is, but I can't imagine it is taking up that much space. I recommend leaving it intact. If you do anything with it be sure to archive it rather than delete it.