Just FYI, thanks to the ever-so-awesome Jörn Zaefferer, we have an updated tag intellisense / autocomplete dropdown that works for tags in the middle as well as at the end.
Prior to this update, the tag intellisense dropdown only worked for the last tag in the text box.
I searched and searched (even with Google!) and could not find an open bug on this, although I swore I saw one, at one point..
What other improvements make sense for the tag editor?