But he doesn't just need marginal improvements in command and pitchability to be a good SP, he needs very large command improvements and very significant improvements to his offspeed repertoire. What he needs lies somewhere in between expected growth and a quantum leap forward, but it's probably closer to the latter. Disagreement and discussion on the exact level of improvement needed, and the appropriate wording with which to describe said improvement, is futile.
See my above post about foam fingers up butts and feel free to apply it to yourself thusly.