You dont' need feedback from Airbnb to improve -- you can improve your hosting by joining the host community and learning tips and suggestions from other hosts. In fact, feedback from other hosts is much, much more likely to be useful to you than the automated feedback from Airbnb which comes via guest comments/ratings, which are subjective, sometimes not accurate or useful, and even at times, quite inappropriate. Hosts are the best help to other hosts.
You can also talk to your guests directly and ask them questions about what they might like.