Justin,
I am aware of the multitude of factors at play. I assume that when I am talking to you, Badger, Mullet, Marc, Hillbilly, and other experienced bowyers that we are taking those factors into consideration before we present our perspectives. I also assume that you know the advantage lies with high energy storage when shooting heavy arrows.
I don't know if you've ever seen this, but there is video footage of an actual Mary Rose bow being pulled on a tillering tree. They tested a number of them. What they found was that they had perfect tiller and--despite a variety of bowyer's marks and sections--the draws progressed the same way with the handle bending in the last 3" inches of draw. These were not mass-produced, short-lived junk bows. They were masterfully tillered. What impressed me as I studied them was that they were more complicated than I thought. Every Mary Rose bow is unique as they were built by a lots of bowyers but they all follow a prescribed pattern that reveals a thorough knowledge of energy storage and mass placement. For example, they could have used self nocks if they were willing to have 3/4" wide tips, but instead they added horn tips and scraped every extra grain of wood off that they could. The result was a bow that outperforms $1,200 Blackwidow recurves with arrows @ 9 gr. per pound of draw weight.
Free Speculation: If the bow would have performed better with rectangular sections, it's hard to imagine the King of England saying, 'well, let's just build them the fast way anyhow.' For my money, producing oval-D section limbs like the MR bows is way harder than building flatbows any day of the week.
On the hunting bow subject:
Being the successful hunter that you are, and taking into consideration that you say you group arrows out to 30+ yards--you have obviously developed a system that works very well. I'm seriously jealous.
J. D. Duff