I like Dezco because he can make a mistake and get punished for it.
Yet, people are saying this is bad writing? I like the fact that poor choices are starting to have a affect in Azeroth, too many times mistakes have been brushed off.
Sure he gets punished for his bad decision. At the same time, it is one of those, "You never had a choice in the matter" lessons. Destiny and Fate, the whole speel. He ended up having to do what he dread, because he made bad choices and came to the realization that he was a terrible parent, and a terrible husband. He could have saved both his children quite easily, but the writer wanted to take a "Darker Route" for no other reason than shock value.
As to poor choices affecting Azeroth and mistakes all too frequently being brushed off? Will Dezco appear again? From how the story ends, it is heavily hinting to that Blizzard may not use Dezco (or the sunwalkers for that matter) in a future story arc. Dezco's story is largely finished. He is most likely going to stay in the vale and help bring his child up, teaching him the heritage of his people and of the sunwalker heritage, in addition to that of the way of the Lotus.
There is nothing to reap from his poor choices. It is essentially a one shot. It is largely left unresolved. What happens when he returns and tells his people what happened, of his easily resolvable problems.
"That is for the reader to decide" echoes in the back of my mind.
Literally nothing will be learned from this story.