ymmv.
honestly, if you're looking for the "game" to "feel" like vanilla, it won't. nothing will EVER match that feeling of first entering WoW and seeing xroads, howling fjord, hellfire penn, etc.. likewise, if you favor nostalgia where "back in my day, we had to be at the PC for every single FP along the way.. there were no auto flight paths.. we had to farm water for MC every week" etc.. the game isn't that hardcore anymore. nowhere near it.
with all of that out of the way.. honestly.. it is the best MMO out. yeah there may be some bias there. but I've played FFXIV ARR, Wildstar, DCUO, Rifts, SWTOR, and Neverwinter all recently.. and they are great, absolutely. There are a ton of things in FFXIV that I actually think are probably even better than WoW. But at the end of the day there is only one "the best" and IMHO WoW is still king. The streamlining they did to stats and attributes may seem like dumbing down.. but with icy veins and ask mr robot becoming staples for even casual players.. it just didn't make sense to have all of that complexity when again even the casual player would go, look up 1 or 2 builds, and be done.
about the worst that can be leveled against WoD/WoW at this point is that there is nothing new in the game/expansion for <90. It is only worth mentioning because it's actually only the second other expansion where that was true (BC as well)