I already gave reasons.
More exploration when ur lvl capped with friends so you can do more contents with friends.
Less exploration when your too focused on more grinding.
You and I are veterans, so exploration for us doesn't exist in this game, assuming we explored everywhere in the game already. But I can tell you, newer people can explore more if they choose to durring missions and stuff when they reach at lvl cap since thats when you can start getting things done.