Apple needs to make an iCloud Photos Archive or change the way they store pictures. When dealing with tens or hundreds of GB of photos now they REALLY need to get rid of the idea of "let's throw ***EVERY PHOTO*** in your photos library no matter what it is.. ya let's throw those pics of your wife/girlfriend wearing her new lingerie (or maybe nothing LOL) along with kids' soccer game photos... so when you are showing photos to friends and family on your 65" TV via airplay to AppleTV those out of context photos could potentially just be the next ones in a moment or collection to pop up for all to see!
Sure you can make albums, but they are just links and the photos always stay in photos library which everyone pretty much looks at because who makes an album for every photo they take?
Having different photos albums would be a good start... put away your private photos there and have ability to hide or require passcode to enter it.