I will agree it was probably a missed opportunity not to include a bit more stuff to 'show off' with in the included content. And on that note it was also a missed opportunity NOT to separate out and highlight the new content better in the included runtimes.
One thing that would be handy is a couple of 'scenes' to start off with. At least one or more that a user can click and load that is set up lighting/materials wise to show off superfly to its best advantage.
I understand why the default scene wasn't set up that way, but it would be handy to at least offer it for users to get a taste of what the new render engine can do and sort of calibrate their expectations a bit.