There's a question of what does 'good' even refer to, because you can clear Savage content blindfolded and with one hand tied behind your back, but you'll be the single rudest person in the game. Does that make you a good player? Or a terrible one because you should at least know the basics of being civil?
Seeing how OP is talking about NA/EU I'm leaning more towards the etiquette approach. It's enough to look at how hunts go in the JP servers vs. the constant drama of the other servers to get an idea.