I enjoyed Days Gone more than Horizon, also.Agreed on a lot of this, but I didn't mind the NERO missions. And yes the exposition on the motorcycles was used a lot, but it wasn't a huge deal. And you could skip shit, which is nice. And of course lots of other deails I have mentioned before, like easily switching your firing position based upon given cover.
Horizon IMO is inferior to Days Gone in most ways. When game controls are that clumsy, and the UI looks like an old-school WoW raid, that's a dealbreaker for me. The inventory management was visually repugnant. The overall art was great, and the machines were incredible, genuinely, but it failed to keep my attention past the first trial lodge.