Infamous SS does that one jump button and one grab button system and it feels way worse than anything I dealt with in Unity during my playtime. It's a type of system that is easy to learn but hard to master. Harder than the other AC games at least since I did initially have trouble with it for the first three hours before fully getting a grasp on it.
Infamous SS i don't know, but first light, Infamous1 and 2 don't have a grab button at all.
They have a jump button and a fall button, but the character automatically grabs to stuff, and you can't move up and down freely, you have to jump over and over.
So it's different from what i'm talking about.
There is really nothing to "master" in AC Unity's parkour, it's almost literally "press forward+RT+A/B" and hope the game interprets what you want to do right, watching Arno do his fancy moves while you keep the button pressed.
It's more of a "press an obscene number of inputs, to watch the game do its thing".
I can't count all the times an AC character (Arno included) got stuck for no reason.
I mean, even Shadow of the Colossus had more agency in the platforming, however flawed it was.
And that's a ps2 game.