I had the same combing approach and found it just too much. I think it shines much better if you just do the main quest, and go to those icons when they’re more or less on your path, or when you simply feel like a break from the main quest.

Novigrad looks huge and full of stuff, but then you get to Skellige and it’s like fuck.

And then it still keeps going, and then there’s the expansions…

It’s a great game, but trying to do everything at once is just gonna burn you out