The low food poisoning/dysentery probability that food and non-purified water gives you is great actually - it emphasizes that sweet progressive survival QOL when you find the pure water recipe or are able to produce a lot of food.
Personally I would like to see a much stronger progressive survival QOL increase tied with tech progression, pushing me to use electricity. Even if I do like random loot that actually makes a difference, like the wasteland treasures series, I would like to see water purifiers, ovens that enable cooking the highest level recipes, temperature stabilizers (provided that weather actually becomes a threat), or fridges (if you ever change your mind about spoilage) and many other top-end tech survival solutions.