Ok, not going to support them due to time constraints means they won't be done, not that they'll be done later on when time isn't a factor, as that would be stated as 'we're not going to do the zones now due to time constraints but we will add them in later as time allows'. Not understanding that simple distinction is part of why you also think that things presented as possible ideas, features and concepts were promised to be ingame when they were just possible ideas, features and concepts.
There's no theory crafting on what the DD's were and are, FD states it multiple times throughout them, ideas, concepts, things they'd like to do, not promises, not set in stone(repeated a LOT). Some of them are great, I'd love to see them make it into the game, but since they were blue skying with them, I'm not going to be upset if they don't ever get done, they aren't promised features and mechanics. Everyone does NOT know for a fact that those things were intended to be in the game, because they weren't, that is the actual fact. Misreading, miscomprehension, misunderstanding, whatever it is that makes you think things constantly stated as NOT being set in stone are in fact set in stone, that's on you, you blinded yourself there to the facts.
Promised features and mechanics not making it, those I'll get upset about, those I'll complain about, so should everyone else, because it's right to complain about promised features and mechanics not being delivered. Getting upset and demanding that they put in things they specifically state aren't set in stone, well...
My hair is almost to my waist due to a promise to my daughter 20 years ago to never cut it again without her permission, as I happen to take promises quite seriously. Me not getting her a dolphin for her 8th birthday on the other hand, that was never something I promised to do, that was simply something I said would be cool, and she understands the difference and doesn't give me grief for never getting her a dolphin. You are getting upset for FD not getting you a dolphin.