I realize this won't ever work perfectly for every type of dish. But the dishes I have tried using the given ratios have all come out much better then my previous unaided versions of the same dish.
The ingredient database I am working with definitely needs an overhaul. The original focus of this db was matching ingredients broadly, and that is now becoming a major problem.
I think the ingredient database you are looking for is http://www.ingredientpairings.com/. This brings forward more of the broad matching ingredient problems though. When I redo the ingredient database this should be more useful.