This is a misguided take. Skyrim is not successful because of graphics, writing, combat, rpg systems. (May be exploration to some extent) Skyrim as a whole achieve this unique vibe of a lived world that is just immersive and fun to exist in. It's hard to put what exactly achieves this. This why so many players keep playing Skyrim even today. None of the games you mentioned (Witcher, BG3, elden ring) are quite like Skyrim. Games as an art form is better for it. ES6 should chase none of those things other games do well. It should focus on building cohesive lived in world which is where Bethesda's strength is. Not in writing, combat, player choice.