No, of course not- and heck if GRRM does the same thing, I will forever see him as a hypocrite for his comments on Gandalf and criticism of Tolkein.
But it does mean that on some level D&D understood that characters were changed after death, its just the execution that was shit.
I feel like a lot of their choices are just trying to appease the audience. They think the general watcher wouldn't want a feral Jon, for instance, so they skipped it. But the crazy thing is, they have the power to take many more risks than the average show. GoT is a phenomenon and it built its success by subverting people's desires. But now that D&D are in charge of the story they're scared to do anything that will rock the boat.
Can you believe we went from the Red Wedding to Arya getting repeatedly stabbed with no repercussions? It's really not the same show anymore. And though we say D&D are sloppy or lazy, their real sin is supreme cowardice.