I'm split on the new change in 2078 for OS X to open files in their own window.
I'm not sure if this is a bug, but I definitely think if you drag multiple files to the icon, they should open as a single window, with a tab for each file, as opposed to each file having its own window.
As to the general idea of opening a new window for each file -- there are also times when I prefer the old behavior. When I do happen to do remote-editing from an FTP application, sending files to ST2 from ForkLift, I like the files to keep opening in the same window in separate tabs. Is this new behavior controllable by preference somehow?
In short: for my workflow, I'd like it to open a new window if multiple files or a folder is sent to ST2, but keep the old behavior if a single file is sent to ST2.