Thinking back to whenever I played a warrior, I would try always have my WC active in preparation/fear to whatever was to come. (Ex: Lab4/ Pents/getting 1 shotted by a FB). The fear was always there and I guess that was the risk of that general mechanic in every day Astonia. (atleast if you didn't build correctly)
Making it perm would make playing a warrior feel ALOT different overall so I'm slightly hesitant, but not against. If anything add gaining Perm effect of WC to one of the stances as start.(and maybe make it Arch only) .I feel it would get new people into the mindset of using stances more while not completely changing the core mechanic of the warrior as we've come to know.