Your comments

I'd love to have this, but would dislike it being in sublime itself, as opposed to a plugin, unless it was super quick. Sublime is fantastic being lightweight, and I'd hate it to get bloated, otherwise it will just end up like Komodo, Netbeans or Eclipse.
I'd like this, but it feels like it should be a plugin to me
Regarding the tab focus change on close, I quite like Chrome's, although I imagine this is very much a personal preference thing.