Why would low lift head flow hurt power?

Plus, why do you want the valve hanging around those low lift? It makes no sense.

No matter how great your flow is at .200 it better damn well be better at .500 and .600 and .700. Why leave the valve there.

Valve speed is horsepower if you control the valve train.
Yep. Kind of what I like about rollers, they don't hang around below max lift very long