A long time ago was gametype called "HoonyMode". So its same duel but with fraglimit 1 or suddendeath mode on. If you make a frag you win the round, to win you must win "N" rounds.
-Its mix between duel and ca. If you want to switch from ca to duel HoonyMode is best thing to start with. You can choose your start strategy like build in starcraft.
-I think that it is better then just 1v1 for viewers because there is pauses between round where commentators can talk how (they do not have time to describe all in duel) or what that was or show a videoreplay of frag.
-there is no spawnfrags so less random.
-it is still new gamemode and it is easy to make.
Maybe its needed to refine: add a timelimit in round or decreasing health after some time or add ability to choose spawn.
What you think? it is good idea to put it in reflex or qlive?