I noticed that on the matches display is showed also the running matches and the "Join" button is available. Would be great then to be able to REJOIN a match where you got the DC (during beta happened a lot of times to disconnect just for some lag-timeouts or network errors).
Shouldnt be difficult... the AI ingame still keeps the NAME of the player so basically when doing the REJOIN it should only check the name if was same (or also the ID of Impulse) and if same, allow to rejoin the match (and take back the place from the AI).
If you even want to make it more "secure" you could even enable a vote system to accept the user (or kick them). (L4D is a good example)