for my money Op Flash died for two reasons. Firstly the holding back of O2 leading to a lack of fan mods. Secondly and most importantly not being able to join MP while a game was in progress was such a killer to this game. This made MP in OP Flash such a pain in the arse.
Personally now BF1942 is released i can play an MP game that has the scope that games like OpFlash and BF1942 offers without the waiting around for ppl to join, waiting for the next game etc. ..... Lets hope Cody and BIS learn the lesson in time for OpFlash2
