First off, I think this article is a fair representation. Yes, the first part sounds a little one sided, but as you read the rest of the article, you understand why.
Where you stand with the information in the article depends on your point of view. I look at it where we need people that are going to push the boundaries. Plus they are releasing so much information about how they solved the problem, other games can take all that research and use it. Others may think, no they should be keeping the research to themselves, or go with established solutions.
As for Derek being semi-right... He said that combined first person and third person wasn't possible, or would be crappy. He said that multiple people getting on a ship, then landing somewhere else with no loading screens was impossible with current technology. He said that the full scope of the game can't be made for less than $150 million, well he might be right, but they are at $124 million. He seems to suffer from, if I can't do it, nobody can. Also, last I checked, CIG is still working on the game, and according to Derek they should be completely out of money now.
Do people have legitimate concerns about the game? Yes, but I've read some of Derek's ranting and ravings and he even admits to posting stuff to try to piss people off.