The moving stoker seems to be coming up frequently.
We had a similar discussion with a couple at the recent STR. Captain wondered how to keep the bike more stable. Without hesitation my stoker asked the other stoker, "do you look around his shoulder", the answer was some form of yes.
My advice to the other captain was ask her not to do that. I believe my stoker explained it to the other stoker and gave advice of look without leaning.
Not to pick on you CFBoy, but this sounds pretty intense from your post.
Instead, think of making its average advance vector equal the direction in which you want to go.
I just pedal, steer and do what I'm told, if I'm doing that thing you mention, I want to get paid more...
PK