Does it say anywhere that wearing heavy armour gives you an exhaustion multiplier? I think I've missed that. If it does, then that might give us additional comat situations where exhaustion will be tracked.
If I'm not wrong in reading how the School of Hard Knocks has refined the system, it does. But I should double check. For sure it could.
I mean that every fatiguing skill is presented in the book with exhaustion point expenditures (5 every round, 1 every 2 rounds, etc.). Some skills, instead, as they govern (temporary or enduring) modifications to other actions are presented to show that they
modify the exhaustion point expenditure: maneuvering in armor is one of them and shows that wearing SL armor does not affect expenditure (i.e. the modifier is x1), RL is x2, CH is x3 and PL is x5.
The doubt I could have is whether the exhaustion modifiers apply to moving maneuvers
only or not (i.e. only if you need to roll for something and the roll is affected by the armor MMP). And combat by itself, if I'm not wrong, is
not affected by armor MMP. But...
SOHK describes a lot of ways to combine/overlay actions, and it seems to me that it does it smart: an example is the suggestions to fight while moving that automatically cover charge bonuses. So the exhaustion points guidelines seem to get along with this combining/overlaying. At this point I would say that most of it is depending on the game style: it's usual to have characters moving at run pace (it's in every RMSS example). As it's a stressful environ you could ask for a maneuver roll just to see if you stumble (it's not in any RMSS example), as well as you could ask for a maneuver roll to see if a character manages to turn in place and front an enemy at his back before being attacked, etc.
In the end, maybe it's not by the rules RAW (even integrated by SOHK), but it seems to me that affecting the exhaustion costs of Weapon Skill usage by armor modifiers could be reasonable.
I was a RM/RM2 expert in the far past... I'm no expert anymore (I'm not able to find out time to
prepare the game sessions). So accept the lines above just the way I imagine it could be played. This whole thread in the beginning started just to receive comments on the topic from people that actually play RMSS and to try to go beyond the mere drooling I've got every time I pick one of the RMSS books from the shelf and start reading here and there.