Really good suggestions!

"Update Steem.io" Steemit has indicated plans to do this. Not sure the timeline though.

"Update the whitepaper" I have heard that they are not making this a priority at the moment. If this is going to get done, I think someone in the community (who is knowledgeable enough to do it right) would need to get it done.

I am working on updates to the FAQ page. I will try to include something about "Explain the launch".

"Promo video" - people in the community can definitely do more of this!