Ye, I feel like the ideal way to communicate that is just showing on the FEP bar in the character menu how much the food will give you when hovering it, EX:

I also feel like everybody should be advocating for how much hunger a food gives to be calculated when you eat it based on how many FEPs you actually gained, as opposed when it's made + symbel's hunger% reduction being removed + something be done with double FEPs to prevent them being twice as hunger efficient + variety bonus is probably going to be stinky + it's not clear if eating a 5 hunger food at 300% hunger will give more hunger than eating a 5 hunger food at 50% hunger, which could end up yucky.
I'm personally not going to complain too much before actually using the system, though. Pretty sure even if it's implemented in the worst way possible it'll be x100 better than what we have RN. This has been my biggest complaint about the game since they nerfed salt, so I'm p chuffed about it.