Did not read the full thread, only the initial post. So, I am sorry if I am repeating already said things or not answering some questions.
1. There is only one outdated tutorial. It is the one explaining how to use Noggit. The others might lack some files in the devkit or some small issues. There are 100% complete and relevant tutorials besides that, so saying that no tutorial is up to date is simply wrong.
2. If anything is wrong or not present in _my_ tutorials, I am most likely aware of the issue as I am the one who wrote them. I just lack time to do everything at once but I want to get back to it in January - February.
3. Speaking about learning WoW modding. Those people who came to this scene before 2011-2012 had pretty much only one useful tutorial which is Eluo's Worldbuilding Basics. I can say it did not help me much. Besides that, we had a load of crappy tools that mostly worked through CMD. Noggit worked 10 times worse. Custom WMOs and M2s was only something we could dream about, tools for that purpose were either unusable and unfinished or did not exist at all in most cases. How do you think we learned everything? Practice, experiments, reading of WoWDev wiki and reading information provided by some experienced guys like Schlumpf. Now you have got everything to start. The thing is that now with all available information you can start WoW modding but if you don't dig deeper your experience will stop on the first obstacle you get (believe me WoW modding is made of them). So, take your time learning, ask questions, try things or, as much as I would not want to say it, leave.