Best since TBC!
For an aging graphic engine, Blizzard impress the socks off me... sure the age can be seen, but I gotta say, after playing Warcraft III, it's hard to believe that they can almost pull off 2012 cartoony style graphics with this engine, it's absolutely amazing.
WoW has always been about buttery smooth cartoon graphics, layered with a darkness only Blizzard themselves can duplicate... Jungle canopies feel like ceilings, Dark zones feel like a nightmare, etc.
MoP captures many Vanilla elements such as re-focus on World PvP being at the top. Of course the quest lines are much more linear, but that's because Blizzard are possibly the greatest Storytellers you could ask for in an MMO.
You'll never run out of things to do, dailies are a filler, but the vast amount of them gives an "almost" fresh feeling everyday... you won't repeat very many of them until you hit exalted, at which point you won't need to do them anymore except for a good cash flow.
The Dungeons are "à la" WOTLK - however they have many mechanics that just weren't there back then, but most of all, they are fun to do, and there's a lot of them, you won't get sick of them quickly because you simply won't have the time to run as many, with everything else you feel like you need to do.
With so much to do, you almost feel like you need to keep a schedule, which is a good thing, because many times I found myself logging out with 10 other things in my bucket list for that day incomplete.
This game is a solid 9.5 for fun, it has refreshed my love for this game & company.
This is coming from someone that's been playing since Vanilla WoW