It solved the turning issue, but complicated the other turn (front to back)
You can balance this out by adding some more forward lean to your highbacks. Your heelside response comes almost entirely from your highback because the human body doesn't really have any joints that can bend in that direction to give you leverage. With more forward lean, you don't have to straighten your legs as much to initiate a heelside turn, which makes your ride feel more responsive. As an added bonus, it also forces you to bend your knees a bit more, which helps develop some good habits.
Too much forward lean will exhaust you quickly (you have to stay in a low squat position all the time) and can cause your highbacks to dig into your calves. As with all things snowboard, you have to find the right balance for you.