11th house overlays are my personal FAVORITE for many reasons.
i disagree with the 11th house being viewed as just a "friendship" house, it's much more than that, imo. my boyfriend and i have eachother's venus falling in our 11th house, his sun also falls in my 11th. we also have a lot of pluto and venus contacts to other personal planets/points though. when we got together, it happened quickly, and it was physical. but underneath all of that, we have a GENUINE friendship, and we also knew that we both saw eachother in our future. it's the house of hopes, wishes, dreams, acception. 5th house is how we give love, 11th is where we receive love. i like the 11th house because it also allows you some freedom to an extent, it isn't as smothering as the 8th house. that could just be my venus square uranus talking, my boyfriend also has venus square uranus. so maybe it is just important to check out your own chart and whoever you're seeing to see if they would do well with the 11th house. it's all about preference imo.