What i don't understand is why are we comparing these 2 games? Arma is simulating a virtual battlefield whereas Dragon Rising is more of a tactical shooter. Arma does a good job at that, regardless of the bugs. Arma WILL NOT appeal to typical battlefield/COD players.
The current trend of simplifying games is a threat to my hobby, as i see sometime in the future BIS themselves will eventually stop developing for the hardcore gamers and start catering to the mainstream. BIS & DCS are the last companies, that i know of, that are still hardcore and i definitely wouldn't want to lose them.