The point is that the game is not based around gunplay, it's merely one gameplay element. Battlefield, Call of Duty or Rainbow Six Siege are based around gunplay.
Deus Ex, for example, is an excellent FPS RPG (and clearly one of the inspirations here) and it's not built around gunplay and shooting at all. In fact, you could say that individually, all of its gameplay elements are quite mediocre. It's the choices, the flexibility of gameplay, the characters, the story that elevate that game, not its individual mechanics.
I think and hope it will be the same here. It certainly was the case with the Witcher 3: it had competent combat that wasn't going to win any awards; an "investigation" thing (the Witcher sense) that wasn't very exciting in itself; a card game where your starting deck quickly became insanely OP; horse riding and boxing which, again, were competently done but nothing more. It was the combination of all these, the available options, and of course the living breathing world and its characters that made the game the masterpiece it was.