JMHO...
I say screw prone, don't let that dictate shit unless you only ever plan on shooting prone.
I shot a 1-day this past weekend and did better on the positional stages shooting off a bag under the rifle than I ever have before, largely due to the fact that I could get squared up behind the rifle/scope relatively easily using a shorter LOP than I had used previously.
We shot a longer stage (800-1200 yards) from prone off the top of a shipping container. The targets were at 800, 900, 1000, 1100, 1200. I hadn't shot prone at all since going to the shorter LOP (forgot), and yeah, it felt a little weird, I didn't have a lot of shoulder contact (or at least as much as I was used to), but I still got 8 out of 10 (which was more than most of the shooters in my squad due to the wind gusting and some of us getting luckier than others). Only 1 guy cleaned it (he also won the match).
My working hypothesis is: prone is the most stable position we can/will find ourselves shooting in, stability-wise almost everything is already going our way, so tune/dial your LOP to work for you with the other/harder stuff, and shooting prone will take care of itself.
It's worth mentioning that many of the stages were modified-prone using a bipod and rear bag while crouching/kneeling/bent-over weird... the shorter LOP was much better for all of that type of stuff for me. I shot a couple of stages ok like that and was in perfect position on a few more while I jammed my gun and basically pissed down my leg lol.