Shorter limbs store LESS energy but have less INERTIA. The best compromise is to sinew or laminate the bow into several inches of reflex.
The thing is, a 56" D bow drawing only 50# @ 25" won't be so overstressed that it would be unmanagable. Made from a good wood like Osage, ipe, or tempered white woods, I see no reason why it wouldn't be a great blind hunting bow.
Jay Massey used 56-58" sinew backed flatbows pulling 65-75# at around 26" hunting in Alaska and had no problems on moose, deer, etc. I'm sure you can get it done just as well