The Google Chrome browser has a handy feature called "Close tabs to the right". It is useful for tidying up tabs. You drag the tabs you want to keep to the left, and then do a "close tabs to the right" on those. It is a more general version of "Close others".
Nope closest thing u can get Right now if you don't know how to do your own plugins is sublimators QuickClose bitbucket.org/sublimator/quickclose
I'll put this in the next beta.
I'll also expose the view positions to the API in the next beta, and add functions to query views in a group, and to move views within and between groups.