Did the survey!
I feel like improvement happens when there's consistency (practicing/creating everyday or on a schedule), confidence, and openness. The consistency and being open to try new things are obvious points, but by pushing through those moments when you know some tracks won't be released, live up to their full potential, won't be finished, etc. and resolving to make the best stuff you possibly can, there's no way you can plateau (at least not for long).
I know you'll get your data from the survey, but doesn't hurt to discuss this with more people