One thing I didn't even consider before is that, with this being their largest world yet and all, they end up feeling the need to include an in-game map. That would suck.
This is more of a personal issue than fair design criticism, I guess, but more often than not I end up playing open world games while staring at the minimap. Not my character, not the enemies, not the world, the map. I experience the world through my periferal vision while I chase icons, it sucks.
And I can't even blame the design for that, because even if it relies too much on the map, I could just look every now and then to make sure I'm going in the right direction, the fact that I keep staring is my own fault.
Which is why I always disable minimaps whenever the game lets me, even if that leads to me opening the full map all the time, because at least the game isn't moving while I do it, and I'm not missing on anything.