I have found that humans generally eat way more than they need to,

This seems to me very unlikely, since deviations of more than few percent from TDEE lead to unmistakably rapid weight gain or loss.

Still, I like the idea of "focused eating" for enjoyment, and plan to try it a few times.

Interestingly, just as I lack the skill of eating slowly, some people seem to lack the skill of eating quickly. This skill isn't as useful for hedonic purposes, but does have some practical applications.