Yet you sing the praises of Witcher 3 like it is the best thing since sliced bread. Maybe it has been a while since I played it but what else did you do in that game? Go kill this, go kill that is what I recall, find this find that
I enjoyed exploring the world and discovering camps, nests, nero sites where you get upgrades. Sure maybe a bit more variety would have been nice, but not going to knock of loads of points for that. There were also some stealth missions, upgrading your bike, buying new weapons etc.
Witcher 3 is a game I really enjoyed also, but overall comparing the fun I had between the two, it was not worlds apart for me.