Simple, own it. Be yourselves that's what we came for, but be better where you can be and be humble when you screw it up.
Ensure that the Maddison issue is fully dealt with, for all parties. Make it clear to the current staff exactly what is expected and how the conflict resolution process works, assign mentors from different departments for the younger/less experienced staff.
Ensure all staff including Linus, know that the book stops with Terren. Linus cannot continue to hide behind the loveable rouge mask
All press releases and non wan show responses are properly vetted, not just rushed Forum Comment that potentially contain further errors/issues. A disclaimer within the wan show that Linus/Luke/Dan's comments don't necessarily represent LMG.
People giving tours are fully briefed!!
A review of and clearer access to LMG's policies regarding ethics/testing/ad or sponsorship placement within videos. With corrections being properly promoted even if its a webpage listing errors that's linked to in the comments with a reporting mechanism for anyone finding mistakes.
Jikes, seems like they don't understand how this, at least to some, makes them look. I think the intentions were good but the execution and understanding of the community were horrible in this case.
When addressing an issue of this scope one should not put that video behind a paywall.