Ah yes, but that was DD's first year here and quite a few of the Texans opponets did not have enough game film to setup a defense to stop him. This year MAY be a different story, especially if we have the "run to setup pass" offense.
Throwing Hollings in this year will mess with the team's minds once again for a different type of runner, not enough film on, and keeping their defense guessing. I agree with the above note, that it's a good to have such problems.
My thought is they both get touches for years to come (assuming both do well after the honeymoon is over).