I've been watching a Japanese airsofters YouTube channel and it's quite interesting to learn how they play. From what I understand, the majority of their sites are CQB. Even outdoors they run around a village type area or between shipping containers etc. Also they only have three different BB weights, 0.20's, 0.25's and 0.28's. The last of which can only be used if they're in a bolt action rifle. I don't think they have any MED, so they're happy if they can reach 30M with their bolties.
TM have been regarded as one of the top Airsoft manufacturers for a very long time and are obviously successful/content the way things are. Why mess with that formula.