Customization of what exactly?
Islands are no smaller than JPOG's building size.
Two dinosaurs are undersized. Easy fix.
Terrain tools do exactly what they need to. What are you expecting? To be able to paint tundra a few hundred miles from the equator?
Considerably more animations than JPOG, and to say the quality of the animations is "low" is an insult to an animation team that quite honestly deserves a damn medal for their work on this game.
AI is just fine. Better than JPOG's, at the very least. Could be better, could be worse. This is what you call "comfortably good".
Guests are some of the best I've ever seen in a park-builder, visually speaking. They interact with their environment in all the ways I'd expect of a 2018 AAA title, and in ways I didn't even expect they would.
No, they wouldn't have had plenty of time to implement your big laundry list during development. Making a game is more involved than just "We want this, type type type, done!" Planet Coaster had exactly zero support for the star of the game, which are dinosaurs. The vast majority of development time rightly went into making the dinosaurs look, sound and move beautifully. Your expectations are absurd if you think any dev team could come up with the kind of game naysayers are demanding in the amount of time they spent making this game.
No, we do not have the right to demand anything. Well, we have the right to demand it, verbally speaking. We don't have the right to receive it. We didn't crowdfund this game. We didn't give them money based on specific promises made pre-release. Whether it's video games or cutlery, the responsibility for spending one's money is on the consumer, not the manufacturer. It's your job to research the game before you buy it. Frontier never promised the things you and others are expecting, and if you jumped in sight unseen expecting your perfect game and didn't get it, you screwed up and that's entirely on you, I'm afraid.
The only thing anyone has a "right" to is what they've wrought with their own hands. If you want a perfect game, study the skills, take out the loans, assemble the dev team, and make it yourself. Harsh as it sounds, that's life. We have the right to expect whatever we want, but that doesn't mean we're literally entitled to it. When I walk out the door, I expect to be treated with dignity and respect by my fellow man. But if a cashier treats me like dirt, he hasn't committed some offense just because I spent money at the store he works at and didn't get the treatment I expected. Why is game development any different?
I don't mean to sound so harsh, but I'm getting pretty sick of gamers having this ridiculous mentality of entitlement and trashing perfectly good developers because they didn't deliver what that specific person wanted. The only time that argument works is if a game is crowdfunded based on very specific promises that aren't delivered, and that's not what happened here. Like the game or don't. Keep it or refund it. Believe in Frontier and continue buying their games, or abandon them. Those are the only entitlements you possess here as a consumer.