I wish more foods are added to healthy beyond salad and what a few other dishes? I also wish the caloric calculation of food and hunger regeneration was adjusted (example most fish/egg dishes should have half the calories for more accurate simtheory). From what I have heard some newer/pack foods aren't set/assigned like base game calculations. And the fact that you have to workout like a mad man/woman just to maintain your Sims weight is IMHO triggering (I use a mod to turn this off).
But I think what needs to be done is that food shouldn't be treated like it was in the 80s/90s since many foods back then have been since been debunked as "bad/fatty" foods. Sims caloric numbers look a lot like those out of date diet guidelines. This can be triggering both ways healthy/good and fatty/bad for people. Healthy (Health Food Nut) can just be non-processed and no added sugar foods.