WoW is popul;ar because it USED to be cutting edge. the same reason Runescape gained popularity years back as well.
The only reason either of these two games still so much as EXIST is because of clingy defensive fanbases -.-
If you have a quick look around you WILL find a ton of great f2p MMORPGs out there, if you want something different from the generic "WoW clone" MMORPG (some of which ARE still quite fun on the basis of being technically superior to WoW) then check out a game like Draconica, Twelvesky2, Spiral Knights, Lunia, or some of the other thousands of good MMORPGs.
Quite frankly I see your point, a LOT of people have looked at WoW, thought "Hey that was successful" and made a carbon copy... sometimes better, but usually not.