@jer @viclin: This should be available on November 10. Note that this will NOT give you hour as a dimension to be used anywhere. It will let you compare a specific hour against the same hour on another day. For hour as a dimensions, we continue to recommend a Time Parting solution using JavaScript.
Very good point and request, Andy. This makes a lot of sense to me. I can't commit to anything right now, but we'll keep an eye on this idea and discuss internally.
In case you haven't been doing this, when you add that text visualization you can collapse it so that it only shows its title. I know it's not a "solution" to this need, but as a workaround it is not terrible.