Sounds good though I've never needed it. Currently you can use the right click popup, or type
/dcc send followed by the first letter of the nick then TAB to autocomplete.
You can also use an alias that will automatically append the nick to a
/dcc send command in a chat window:
- dcc if $1- == send && $window($active).type isin query chat { dcc $1 $remove($active,=) } | else dcc $1-