It would be great if we could include the last seen data when we export audience data - we use this information in our retention strategy and currently have to manually check when someone last logged in.
Also, the current Audience insights shows the last seen date but doesn't show which hub they were last seen in & unless they watch or search, it's impossible to get further information in the user's profile. Just knowing which hub they accessed last would help those of us with multiple hubs.