I think every AC games from the latest era. They are nearly perfectly average. Because they are exactly mediocre in all of the 250 things they do. Combat, exploration, quest design, graphics, world design, art design, story.
Exactly half of every game made is better and half of them are worse. But rarely anyone is attempting 2-3 of those 250 things at a time.
Focus testing and excellent budget management has made Ubisoft consistent in producing them so that each and every one is perfectly middle of the pack in every way. They polish each thing until the exact moment it starts to not suck and not a second longer.
Nothing about any one of them is excellent.
Afterthought: I think horizon would have started to be the same except the engine and graphics are so good they accidentally excelled at that.