Also experiment with forward lean. You may need more. (left and right do not need to have same amount of forward lean either).
Since you are washing out at the end of the turn, I would put more lean on the back binding compared to fornt binding. It will help you put little more pressure on back foot when you are doing heelside turn.
More forward lean will generally make heelside little more responsive.
Also after trying all the advice you got on this thread, please post what worked and what didnt so other people can benefit from it.