spunout: I do concentrate on keeping that laid back wrist at least until near contact (only been doing that for about 4 months) so it might be contributing to that. My arm certainly does look tight and I'm wondering if my backswing is too small in radius. I was certainly swinging as hard as I thought I could and have a reasonable chance of getting them in.
I would separate practice from matches. In practice (especially when you are hand feeding), I would just let loose. Get the swing speed up even if the shots go out. And while doing hand feeds, I would not focus on keeping the laid back wrist until contact. It might be helpful to feel that you got into the laid back wrist position, but once you pull to contact, don't worry about the wrist. Maybe you can visualize smacking the ball with the meaty part of the thumb base (you may have to adjust the visualization focus based on your grip). Also, I wouldn't worry about the backswing now.
Try googling Kyril forehand drill and see what he does.