I feel like you guys are painting a picture where the trailers were indicative of one thing, whereas the actual game looked like another thing entirely, and the two never converged.
I strongly doubt that's how this works. Vertical slices, yes, but it's not to say that CDPR, at that time, didn't think that they could hit that. It's not like they were saying "We know exactly what this game is going to look like in two years time, let's fool them all with this deliberately misleading trailer!" I bet there were painstakingly awful decisions made within the company that no one was happy about and constant gutting due to god knows what. I don't doubt that the same thing happened to Watch_Dogs, Dark Souls 2, and whatever else.
That said, I still do have a problem with how they handled it after the fact. Their PR was weak and they've done nothing but deflect. It's unfortunate and weird. This is why freaking the hell out over graphics is terrible. The devs didn't want to say anything earlier because they knew they'd be ripped to shreds by a vocal minority and it'd look bad before launch. So they did the worse thing and kept it close to their chest, which only invited more of it and made it more deserved. Meanwhile, they've got this apparently great game sitting there, and those devs are let down by the PR team. It's a fucking mess.
It's the reality of the situation. The game is what it is now. PR needs to improve, but to what end? What's really at stake here? Some people act like there's war crimes being committed, it's pretty outrageous. It was bad with Watch_Dogs and it's bad here too. The whole thing's unfortunate, yes, but you've got to have some priorities.