It's an easy enough thing to try out. The original reasoning behind the lower multipliers between campaign & RTS was that we wanted to give every player a chance of making a difference through skill-based play. The higher the multiplier, the more that goes away, but indeed, I can see the case for it.
I think we might be best off attaching a slider to this one though, because I'm sure not everybody will want to be chance less in battle, especially the players who are participating without any starting units in 4 player matches.
As far as pure skill based RTS gameplay, I agree with your original intent. It's better with lower multipliers if that is your goal.
Personally I find the strategy and campaign map side more interesting so that's why I prefer those decisions to have a greater impact.
In a purely PVP environment the lower multipliers makes sense. In single player campaign against AI's though I would prefer more significance on the campaign map and cards.
