I think it's down to feel.
If you assume your dead straight bow was stressed to 90% then you can't add much reflex without going over 100%, unless you add a bit of deflex to compensate or go longer or wider/thinner on the design.
Too much reflex is a pain on the tiller.. hard to get to brace and then you come in underweight (or so I've heard
)
Bottom line there is no "free lunch" with bows. Ok some designs are geometrically more efficient, but you are still limited by the materials.
It depends whether you want smooth and forgiving or pure speed... hunting or flight?
That's why we all keep messin' with the wood
Del