The game is very catchy with its atmosphere. You're afraid of machines, you hide and hunt them, you're curious to find out what other kinds of machines there are and what happens if you take control of them... for the first four hours of the game. Very quickly the gameplay is replaced by running between two mission control points to listen to a dialog of a few lines. The dialogs include an answer wheel, which is really just an option to either listen to additional lines or immediately get a new mission point on the map. On the way to this point are necessarily deliberately placed machines, which you eventually start to just run past, because killing animals in this game affects your character's progression more than killing machines.
The plot... There isn't one. Machines once rebelled against humans, and the main character spends the entire game searching for details about what happened and who her mother is. Only the very last mission of the game tells about the events in real time and somehow resembles a real normal mission. All other quests are a simulation of walking from point to point with an enviable use of witchy flair to map other people's footprints and collect notes.
In short, they invented the mechanics of machines and hunting for this game, invented a bunch of graphical crutches that even the PS4 uses to give it deceptively beautiful graphics, slathered it all with actual SJW and LGBT agendas, but forgot to invent the game itself. It's just a disgrace.
I would say that Horizon looks like a typical Ubisoft open-world shish, but no: Ubisoft games have more diverse activities on the map, and the arsenal of weapons is more diverse, and at least there are memorable charismatic villains that are interesting to watch.
The DLC for the game is excellent, I have no complaints about it. It is interesting both gameplay-wise and story-wise. I went through it in one go and was satisfied with it.