Direct from the Derby City Classic website, here is the new speed-up rule for one pocket. I think it will speed up the game.

A Maximum of 4 Object Balls Allowed Above the Head-String
At the end of a players inning, if more than 4 object balls remain above the head-string, all object balls above the head-string will spot immediately. A ball is considered above the head-string if any part of the ball is touching the head-string. (Edge of ball determines)
This will enable some new tactics. Maybe players will work to leave object balls between the kitchen and side pockets rather than sending them farther up-table.