Yeah, I came here to file this exact CR, found this and voted for it instead.
Outputting HTML tables and such would be huge . . . though I suspect it would require Jenkins support.
If security is the issue (mentioned above), about about at least allow us to create a HTML page "someplace" and provide a link to it. That way you could build the results in HTML and make it easy for the user to browse to it. This does have problems though given multiple users from multiple clients . . . you need someplace to store the HTML and some kind of clean up function for when the user is done with it (or 2 days later) . . .