Have you tried frog kicking? Your knees will be further apart and you will be less roly-poly. An added bonus is a frog kick uses less energy and saves you air. I only scissor kick these days if I have to fight a current or chase someone.
I have a Zeagle and often wear my steel 80 with it along with 2x2lb weights when I wear my 3mm in salt water. It’s so comfy.