I think one of my biggest problem with the game is the lack of zones. There's literally only 3 zones in the game(maybe there's a 4th at higher levels but I haven't seen or heard of it yet). Part of what made XI great was the variety in the zones. You could start out in the highlands, go to the marsh, rolanberry fields, crawlers nest, citadel etc.

They all had different themes, different music, different quests associated with them. It really helped break things up. Not to mention the storylines did a great job in utilizing almost every zone