* create cyberware that lets you change postures faster.
* allow weapon specialization to make switching postures faster.
* drugs allowing you to change posture faster
* MA specialization allowing you to change postures faster.
* Other things of that nature.
I also had an idea that maybe starting posture could be dictated by a combination of Weapon Type+Crowd Size/Environment Type+(Attacker or Defender) but I have serious reservations that this may be OP and game-breaking to our well-vetted combat system.