The one missing command that gets me copying code over to vim and back is :norm. (For anyone unfamiliar: visually select several lines, type :norm, then some commands, and the commands will be applied to each selected line.) I use it quite a bit to make systematic changes to areas of code, since when it's applicable I find it quicker than macros.
Any chance this could be added at some point?
(p.s. thrilled to have :imap now...jk is my new <Esc>)