New way of creating a playlist

[Szymon2]

Could Spotify add a further that's allows us to swap favourites list with any other play list? Thats will help us creating playlist just with on click (Add to favourite). Most of us listen many miusic style and usually won't listen them at the same time. It's how I see way of creating playlist. Could you tell why doesn't it work like this? I don't think so I'm the first person who's having that idea.