Currently you can filter on feature Board by Release name, however what it returns is still all the releases but with no feature cards for other releases that you have not selected. This makes the viewing of the feature board still messy. Any chance that if you are filtering by releases you only see those releases and not blank other ones?
We are likely to implement this feature request.
We have merged your idea into another idea with the same request: https://big.ideas.aha.io/ideas/APP-I-602