I had the opportunity to play some darts games, for example in Worm Olympics. I think that it is a very funny scheme which takes little time to learn. I can agree with SPW when he says that after a bit of time some people may lose the spirit of play because it isn't a very tactical scheme and it's limited to just 2 weapons , however I believe that, like almost all the schemes, it's pretty hard to master. It isn't just my opinion, would be enough to look at dS Tour's statistic, Komo couldn't win all those times in a row if he wasn't a skilled player.
Luck factor can be relevant but it's related mainly to the use of maps so it's easily fixable. Last Komo's idea sound good too to reduce this factor.