Simply; let us change combat stance while we are in combat.
Previously it made a lot of sense with the card game, but now I don't see the point of not being able to change stance while fighting. It would make sense if there was a big penalty to doing so, such as losing some opening/costing IP/ or causing a long cooldown.
Most of the time, i'm just foraging and killing ants and bears, and one of my combat schools is great for that. But if I get attacked while i'm foraging, I will have no chance to fight back unless the opponent is wearing less than 150 total armor. If I stay in my pvp deck all the time, I have to save up 6 IP just to kill ants. This means that if I want to stay safe while foraging, I need to change deck 2 times, back and fourth, every time I find an animal that I want to kill. And if I'm so unlucky as to get attacked while fighting animals, then I will have to run from anyone with good armour, even if they happen to have 1/2 of my combat ability.