It's not a clone at all.
Leveling isn't particularly difficult but it's nowhere near as easy as it is in WoW. You - thankfully - can't throw cash at the game to skip the leveling process almost entirely.
If you choose to spend 90% of your time in raids then...that's your choice. Absolutely nothing is forcing you to do that. It's like playing Fallout 4 and complaining that you spend most of your time building settlements because you make the decision not to go out into the game world and explore.
Gear being replaced by something better is pretty every now and then is standard in modern MMO's.
Character customisation isn't perfect and could do with additional options but it's still far more in-depth and less dated than what WoW offers...especially in terms of smooth animations.
Crafting is far from a 'sideshow'. It's optional, yes, but it's super in-depth compared to what other MMO's offer. Each crafting - and gathering - profession is literally it's own class.