I made Expanded Food Geens because I also thought that seemed like a weird thing that vanilla was missing. It also adds some stuff for increasing the options for food poisoning, because having a single option that makes you immune for 1 metabolic efficiency felt off.

Alpha genes adds a gene that expands stomach size (max hunger) by 25%. There's no vanilla gene doing it but it seems like an obvious "yeah there should be more of that." A creature that must eat much, but can also go a long time between meals, feasting then fasting.