Datto's video is something I strongly disagree with, and I'm not sure how anyone can be so disappointed or upset when the main premise is completely manufactured.
"If you're going to do challenge modes in Destiny, or any game at all, you need to give them the respect that they deserve or don't do them at all."
This is elitism, plain and simple. 'Hey, Bungie, if I'm not challenged enough, don't even fucking bother, ok?' It's nonsense. Also, we've never had a challenge mode in a Destiny raid, so Datto is outraged over something completely novel not respecting what? An idea he had in his head of how it a challenge mode should work. 'It doesn't respect what I had in my head!' As I said, it's overly dramatic and manufactured.
"I think the worst thing about all of this is just all the negativity it's going to bring. I've been trying really hard to stay positive, but this is just bad news all around, at least for now, at least in the eyes of the hardcore."
This is the kind of posturing that turns differences in opinions about a video game into heated arguments. If you agree with me, you're hardcore and are disappointed. You're seeing a similar implementation of this rhetoric when people on this forum bang on about Reddit. Delineating forum-wide groupthink to dismiss others or to support your point is not a good look.
With all that said, I'm pretty ambivalent on the challenge mode. I'm reserving judgment until I see the other bosses' challenges. I like the loot, though. Good guy, Bungie.