Since openHAB Cloud is in use since quite long time and its use is constantly growing (based on statistics from past years) I believe we have a quite big pool of users to ask what are the features you love, and what are features you do miss in existing universe.
My proposal is fairly simple - post the feature you miss with "I MISS " statement or "I LOVE " to indicate your sentiment. Other users can give it a “like” to to count votes. I think it will be the best and most open way to have a wide user survey.
I do not ask who, how and in which way will implement that. My motivation to is to see pain points and key features you see in existing service.