In Analytics section I can see the general % of how much of my data has description, but is there a way to get more detailed info on that? Like precentages in different datasets, or which percent of datasets have owners or have their fields described etc.

Great question - this is not currently supported in the Analytics section. We definitely want to make improvements to that page! I encourage you to open a feature request so we can gauge interest/impact from the Community 🙂