I've been shooting high FOC (23-24%, guess that's called Extreme) arrows for 5-6 years now and can't say as I notice a difference in arrow flight, but then again, I've always been able to tune my arrows to get excellent arrow flight.
As for breaking through the shoulder blade with high FOC arrows, don't count on it. Maybe with a heavy enough bow, arrow, broadhead and FOC, etc., but hit a deer at the joint or near the joint where the scapula is thickest, and you're not likely to make it through. At least that's been my experience.