There's a piece of advice which is often given out, but with caution because sometimes it can be taken too far. However I think it might help you somewhat with your address position, so I'm going to say it anyway :P

You need to feel more of a sitting posture, kinda like if you are sitting on a high barstool and your butt jutts out. I think you might be shifting too much of your weight towards the ball instead.

Hope that helps!