Mengtzu, a self-acknowedged WoW-Tourist, reviews his experiences in Warhammer Online in a thread on rpg.net. He’s not just a fly by night tourist either, his Disciple of Khaine reached maximum level in the game. He also spots a downside to the living guilds mechanic by which guilds can level up and gain access for members to special teleports, guild auctions, and the like.
It is awkward for members of a small guild that cannot level quickly; your social choice has cut you off not only from the endgame elite, but basic conveniences that any character can access in other games.
There are a lot of screenshots in the thread, and although he likes a lot of things about the game, he ends by concluding that while WAR beats the 5-year old WoW content handily, it still isn’t a match for Blizzard’s more recent innovations or expansion zones. For example, back in the day it would not have been unusual for NPCs to narrate something that happened in the player’s absence. Now with phasing, WoW players expect to be there and to watch events unfold before them.
Read it and see what you think. In some ways it makes gloomy reading, he’s very objective about explaining why he liked or disliked different things, but you can see why it’s so hard for new games to play WoW at its strengths unless Blizzard really screws the pooch sometime in future.