Re: grazing/sleepy baby
the baby's age makes all the difference here. Newborn falls asleep after 5 sucks and isn't pooping enough? Could be trouble. Baby who is older, say 3-6 weeks? Probably okay, but watch diapers. Older baby, say 6+ weeks who has been consistently gaining enough? Fine, don't worry about it (but watch diaper output).
Don't worry about jot always being able to read baby's cues. Sometimes baby doesn't know why he's fussy, either, and he nurses because hey, why not?
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"