Re: Feed on demand, but what if baby does not demand?
Tanking up during the day might buy you more uninterrupted sleep at night... Or it might not. Sometimes night nursing is all about the calories, and sometimes it's about babies having naturally shorter sleep cycles and more phases of lighter sleep, and needing mom's help to get back to sleep when they wake up. So while I think it's wonderful to try the tanking up thing, you can only hope, and not expect, that it's going to work.
Getting rid of the swing seems to have made your daytimes more difficult by reducing the time baby spends napping. Is there a reason you got rid of it? Fear that baby would grow dependent on it, perhaps?
Don't worry about the runny poops or about overfeeding. Runny poops are very normal in exclusively breastfed babies. And you can't overfeed a breastfed baby because the baby is in charge of the feeding. If he doesn't want to eat, he won't, or he'll take a quick sip and then stop.
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!"