I use Code Shaper (both Proxy AND Utility) skills as my primaries already. I guess SOE won't introduce Fire Arms Simulacra because that wld require a few totally new trees. The Proxy and Utility skills are made especially for Hacker and Melee Simes: They buff Viral or Melee stats for them. For Fire Arms Simes u wld need to develop a tree that buffs a Sime's Ballistic stats
As a Code Shaper I'd welcome the possibility to make Karate or Kungfu Simes. Non-Code Shapers that wld have to fight these Simes probably wont: Aikido is the weakest of the MA trees. If you powerboost a Karate Sime it wld do incredible damage; or if u use Proxy Technician Aura to buff a Kungfu Sime it wld have an unbeatable Accuracy of like 195 (at LVL 50). That wld not be good for game balance I guess.
As much as I wld like it SOE won't make Code Shapers the gods of the Matrix LOL