The option of a role to cancel it is stated in the description of the skill itself (RM2 Character and Campaign Law, red band edition, p. 85):
Once in a frenzied state, a character may make a static maneuver each round in order to resume his normal state.
The text is repeated in RM2. So are you just asking what sort of maneuver it should be, and what difficulty?
I think the way you do it is fine, and even conforms to the rules as written.
just revisiting this topic.
i have some confusion over static action and static manouvre
because frenzy is a concentration skill i assumed this meant a d100 roll +stat/mods was needed to cancel frenzy, is that correct?
Do some GMs choose a difficulty and use the moving/manouvre table for canceling frenzy?
Or do you just use a regular static action?
Do players get to add their frenzy bonus to the coming out of frenzy attempt or do they use SD?