Originality is very hard to argue since most concepts have been done before like a gears of war, god of war or a halo but they do it in their own way similar to how each Zelda after OOT is similar yet different. That's why I feel their very fresh and many many games copy them that's why in hindsight they look like most games on the market but I feel they do what they do best. I agree with you all that Nintendo does unique games in the way that no one makes films like the 50s which in many ways might be great, but I just can't help but say it feels like the 90s.
Gears of war is based off of re4 and kill switch, epic has flat out stated they aped it, and god of war was a higher production value version of Rygar with boobies and disembowelments, which was also directly mentioned by ssm.
Maybe, if its your first time experiencing what they do, I can see how you have your viewpoint.
But sooner or later you are going to inevitably wander out of that bubble.