The nature of Krefeld, with its decisive flank march, offers a challenge to the scenario designer and umpire, even if the participants are all naïve to the battle. Two solutions are offered below:

First, the chap behind the Din of Battle blog simply chose to focus on the flank attack.
https://dinofbattle.blogspot.com/2017/10/syw-battle-of-krefeld-1758.html

Second, Angus Konstam of the Orkney Wargames Club ran Klein Krefeld from Charles S Grant's (w Phil Olley) Wargaming in History Vol. 1, a more manageable version of the larger battle.
http://www.orkneywargames.com/the-battle-of-krefeld-1758/
The scenario special rules dictate a lack of action from the main French body until well into the battle, though such an effect may well be achieved other ways.

Disguising the battle as another is an idea with a long history, and remains not an uncommon suggestion for such famous battles.
Presenting one or both players with a number of command decisions prior to the battle would be a way to alter the scenario potentially dramatically, adding uncertainty and replayability.
A more modern rules system may well have robust command and control mechanics that may be tinkered with to reduce the chances of the French centre activating.
A theatrical host might lead a naïve group of French players out of the room for a snack while the Allied players redeploy;
Finally, one last simple option would be another "what if", with Clermont being attentive, aware, and more responsive.