I see what you're saying here... but there can be some ugly territory in Speed-matching the duration of Stun/Shock effects. (Consider for example a very slow character using Stun/Shock.. his normal speed allies, to say nothing of > normal speed allies, would be able to probably kill the guy before they could move again if the slowster's Stun/Shock was long enough for him to get a second turn.)
Happily, fast characters are something of a rarity in Demon, so this won't come up an awful, awful lot.
Not a great answer, but unless I think of a better one, that might be where we're at here.