Well, I tried thinking about this logically...
Do I snag stoneflies on the bottom?
Yes, Quite often actually.
Well then, I must have the hook riding point down at some points.
What could we do to fix that while maintaining a nymph-ular shaped body?
You could attach a piece of lead wire on either side of the hook shank, making the body flat. Then, you could take a final piece of lead wire and put it on the top of the hook. That'll make the fly ride like a clouser minnow, less snags, and hopefully more fish; Theoretically. But, then its not as flat...then just kinda smush it down, the weight will still be there. Just my thoughts. Let me know what you think about what I think I thought.