MA made taking in account that your weapon is damage 10, so they give more benefits than equally costed Style. Styles you make are too cheap for their benefits. "Gun Tata" is around 60 dp of value and Gun Fu is also 60+
base damage 10 which you can easily bump to 30 with double strength bonuses. Unarmed is also precise, you can't be disarmed (unless you're literally unarmed) and allows you to use all the combat maneuvers.
As for the costs, a lot of the stuff you can do in MA you can also do with 1-2 styles. It's around a 60-80DP savings (and that is assuming a Tao for MA and not a weapon master for styles). That really worth 2CP as for my original idea?
Anyways the argument is pretty pointless since I just made Gun Fu an Ars Magnus.
requirements: Tae Kwan Do (any degree), Running shot module, Movement in Confined spaces Module, Style 80+, Attack ability 200+, inhumanity, trained in a pistol or some version of the gun blades.
DP Cost: 50
MK Cost: 20
The character is considered to have 360 degree LOS so can never be flanked or rear attacked. He can attack adversaries located at any position at his full ability. In addition you can counter attack ranged attacks if you're gun is loaded.