This seems pretty good. I might add something explicit about criticism:
Criticism is a valuable part of the creative process, but please remember that creators can't work without motivation, and criticism usually stings. Try to be compassionate and constructive when providing feedback - think of the process as a collaboration, working together to build something better. It's okay to say 'this doesn't work for me', but try to point to things you liked as well and offer a path forward. Conversely, please value thoughtful feedback you receive, even when you decide not to act on it.