Yes, I'd like to put that down as a request to show when multiple trainings are recommended.

Furthermore, there are certain recipes that require other DoH level requirements. While I think it is against the spirit of the game to place direct level requirements for those classes in the recipe, a heads up of "You should probably have some leathercraft skills to do this recipe" would also be nice. And before you flame me, I know that YG tells you these things, but hints in-game never hurt either .