The best thing you could possibly do for this game to make it friendlier to new or returning players (no idea if that's even a goal) is to remove all of the outdated information from the old websites and to completely flush out the documentation. Whenever you google something to find out how a mechanic works or crafting recipes, you find 3-4 different results with completely different recipes and things that have been taken out of the game. Or you have to find an ancient website to give details on how to do certain things (like trader's chest).
I half agree with you on this one. I don't think information on old websites should be removed because there are players ( like me ) who often like playing old versions of median better then the new one. That said one of the biggest reasons why I like playing old versions is because they actually have proper documentation of the game and just a lot more info about them in general ( like proper guides on how to do ubers etc. )