One thing I can recommend is driving from Honfleur along the coast – D513 – to Trouville and is to my opinion very scenic, so certainly worth doing. But driving in the opposite direction is lesser to prefer as you will see the industrial complex of Le Havre at the background.
Trouville is nice, Deauville and Cabourg are very nice too but more in the area around their casino’s. And the same for Houlgate you can easily fit in. In Deauville you can see the Walk of Fame at Les Planches along the beach. Know that much of the roads will have speed limits of 30 km/h, meaning driving there will be very time consuming. Depending the time of the year you won’t see many foreign tourists there, so good for an off the beaten path experience.
Still have to visit it, but think if having time and interest is Calvados Chrisitian Drouin between Trouville / Deauville and Pont-l’Évêque worth to consider.