There was a bug report that was somewhat recently moved to "Working as Intended."
Basically, the issue was that Quick Draw was not enhancing the effects of the second tier of applicable Enfeebling Magic. Test steps in the bug report used Paralyze II, Blind II, and Slow II (no effect on Slow II already confirmed in the Quick Draw Talk Page) for verification. These results and the transfer of this bug report to its current status directly contradict the wording of this dev post.
Seemingly, Quick Draw has no effect on any of the tier II versions of the Enfeebling Magic outlined in said dev post. Only the first tier is affected.