I'm not sure if this is what you mean, but on cronometer when you put in a food like chipolte guacamole or starbucks ice cream, i'm not sure where it is pulling them from, but it does show all the micronutrients, amino acids, omega 3's etc. does not do vegetable servings or ingredients.
I don't eat composite foods so that isn't something I need, but I could see it being useful. I'd probably use it to try and reduce additives and preservatives and unidentifiable ingredients in my diet if I was still eating those.
I was thinking today I would like it if cronometer showed me all the different foods I ate in a time frame, but it only shows your all time top ten or something like that. I'd like to see exactly how diverse my diet is. Did I eat 100 different types of plants and animals in the last year? 200? What would it look like if everything i ate in a time frame was arranged in a list by calories. 20k calories of ground beef, 16k calories of bananas etc, 50 calories of seaweed etc. Of course it would only do this by my entries so I'd have to clean it up if I put in olive oil sometimes and extra virgin olive oil other times when it was really all the same thing, but you get the picture.