I'm a "meat and potatoes" guy and would rather just have the tools I need then be smothered with what I don't; the reason I like GoW 2018 over Ragnarok.
The concept "player expression" means nothing to me if I am constantly reminded I'm playing a game. I'll certainly play it because I like to dabble in all PS exclusives, but I don't see it topping GoT.
I would even argue the meat and potatoes of RotR's combat system is more satisfying than the "pick the right stance and you win" rock/paper/scissors setup GoT has. As I said, I got the platinum in both games. I played them both inside and out and did basically everything there was to do. But Tsushima's combat becomes rote very early on and doesn't really grow as it goes on. It's just the same fight remixed a thousand times.
Ronin on the other hand is as deep as you want to make it but if you wanna just stick to the regular katana moveset and equip three normal stances instead of branching out into polearms or oxtail blades or shinobi styles, you're empowered to do that as well and the game doesn't penalize you for it at all. You can literally play it like a tighter, more responsive, cleaner Tsushima if you want.