"My standing foot rotates on the floor in several figures. for example telemark turn. In fact i've been criticised by coaches for placing my right foot (step 2) strongly turned. Instead of turning on it(just a habit from my tennis days, when the feet can't turn). I have no problem doing this and also in pivots - without feeling precarious at all."

That is a quite different situation in two respects.

First, it's not a pivot, it's a different sort of action. Might foot rotates on the floor there two.

Second, it is a reverse action. My foot rotates against the floor in a reverse pivot, but it does not do so in a natural pivot.

Remember, NATURAL AND REVERSE ACTIONS ARE NOT MIRROR IMAGES OF EACH OTHER. As long as we have offset in our hold, they will be fundamentally different and require different techniques.