Yes, your point about tomato being acidic enough is interesting because it highlights a flaw in this model of food pairing. The theory is that food that have common molecules go together but as you say that can lead to (for example) over acidic food. I think a more useful model needs to consider the balance of flavours.

Yep! All of those ingredients pair with lemon and the ones with a bigger circle also combine well as a triple.

Haha thank you! Let me know if you have any feedback