Crafting is prevalent but it's not overly boring because you don't spend all your time to craft consumables because once you make a potion, oil or bomb it refreshes itself over time, both bad and good depending on who you ask. If you played previous witcher games you can expect a better game on pretty much all points IMO. Witcher 3 says itself, it's a typical RPG with a lenghty story in a kind of a sandbox world. Wratih includes stealing information from orcs, dominating them, their dogs and giant trolls to ride or company you and some subtle spells. Gameplay itself includes gathering runes for your weapons and leveling two separate skill trees, one for wraith magic and one for combat. The first half of the story is mostly about infiltrating their ranks through domination to kill a bad guy. A high rank orc that kills you or survives your assault will remember you until he dies either by you or another orc who takes his place and rank, it's really cool. What makes SoM great is the nemesis system that made a small debut where the orcs you fight kind of exist in a hierarchy of commanders and peasants. Combat is very close to Batman(surprise) because it's a WB game and does it pretty well. Shadow of Mordor is more of an action game with a small-ish story line where the gameplay is the emphasis.

Witcher 3 vs shadow of mordor