Biggest advise I can give is that you should do a better job at content seeding to ensure that first time users have a good experience. Otherwise, you'll never

Biggest advise I can give is that you should do a better job at content seeding to ensure that first time users have a good experience. Otherwise, you'll never get better from more usage because people won't have a reason to stick around. Then your collaborative filtering will struggle as your user likes become more and more sparse.