When teaching / coaching slalom there is, understandably, a universal problem of weight too far back - to some degree its a "right of passage ". There are many many threads on here about how to transition out of this, yet for many it remains the basic problem.
Having taken some snowboard coaching recently I was struck by some similarities (in balance) the focus of this particular coach was "feeling" where the pressure is in your feet. Once established you can then move the pressure around to effect the changes you want.
There is a lot less going on with snowboarding but there is a good point here. Slalom is a very athletic excercise yet most amateur skiers ski with flat feet - driving from the heals (and yet trying to get weight forward) . In any board / athletic sport the "ready position " is on the balls of the feet - shouldnt our advice on body position be aimed at achieving the correct foot pressure. Ideally when a skier is trying different "key thoughts" a very quick mental check would be to see if the movement they are doing results in the required foot pressure. After all any movement is only relevant in the effect it has on the ski?
I don't think this has any relevance with RTP heel lifting / double boots etc as it's very easy to stand with flat feet yet move the pressure around.
I know there is a GUT of slalom appearing - is this a part of it?
Just a thought