The only thing i think WOW does well is the skill tree's in that it offers some variation. TO many MMO's have classes all with identical powers, who get the same gear and armour and its just dull. The trouble with WOW is the sheer arrogance of it, you can't be the "wrong" spec'd out class as people think you suck because you haven't made the right choices, and people all act like you have to play the same way or you suck, this is the same for most MMO's though. You get people who insist you play the way that suits them best, as opposed to a way thats fun or interesting in a style you enjoy.
Then Wow's biggest flaw is, it really has ZERO story, at all. Theres a back story, the kingdom is under attack, oh noes, the horde. But you never actually play the main story line. Go collect 8 claws from something, come back, ad nauseum till the end. Lotro at least has a main story line.
Although in saying that, it has multiple starting points and generally you can miss out quests and level up a alt with fairly different quests, but multiple times and you do the same boring side missions over and over again and its dull. Lotro suffers by basically doing everything identically with any new alt so its incredibly boring to play through again, though WOW is too just takes a tad longer before you redo all the quests.
Combat might be easy to pick up, but its uninvolved and boring. I want something i can aim properly and hit because i can aim well rather than click a button have a calculation done and decide if i hit it or not.
Raiding/rep grinding all that crap is entirely pointless. Its fake lengthening of a game in the same way racing games instead of adding more tracks, just do same tracks backwards or mirrored, its a joke.