Hi, welcome
Making noise is not really an issue necessarily. My son slept through all sorts of noises so long as he knew what they were. Have you ever put your head on someone's chest/tummy and heard all the noises - heart beating, breathing, gut gurgling, etc. She's been living in there with that noise constantly for months so noise doesn't necessarily cause problems. What did cause issues for us (and I know, a lot of others also) was when the noise stopped. So DS would fall asleep with the shower running but as soon as I turned it off, he'd be awake. You could try using white noise so she has something constant going.
She can certainly nap in the PNP in your room. Naps and night sleep are quite different, so having two different spaces shouldn't be an issue and having a baby who can sleep in a PNP is invaluable when you go out for an evening or something and you can put LO down whilst you eat with friends or some such.
Also have thought perhaps as her A time lengthens this will sort itself out as I can work while she plays.
You're right. Her feeding will be come more efficient and her A time will increase and give you more time to do things.
FWIW, my son loved sleeping swaddled on the floor of the living room and I'd be able to work in the kitchen while he slept. Sleeping in common spaces can work.