Just to throw it out there:
Blizzard should take the time to note that WoW isn't an original game, its lore is from Warcraft, which was intended to be a Warhammer RTS but they never got the deal, so they made Warcraft, similar at the root but very different (and imo better) overall. I can't call out certain places but, I do know that WoW isn't original, there were other MMOs at the time that did many things like WoW but, blizzard more or less improved and summarized the genre, thus allowing it to appeal to many players, this plus the fanbase from WC series, created a hit game. I understand why they want people to stop copying, but they weren't the first to come up with all their ideas. (ofc, at least they're not doing the Worlds.com thing, ugh)
Another thing to note, is that the original team at Blizzard isn't there anymore, Mike Obrien (who created the 3D graphics engine for wc3 that is based from in WoW, and battle.net) left the company to found tri-forge (now Arenanet) along with many other important people. At PAX this year, some old Blizzards in Arenanet noted that few to nobody they knew was with Blizzard from the old days, where all the creativity was.
Kudos to the current Blizzard though, they're keeping things nice and running smoothly, plus yeah, WoW clones are quite dumb and repetitive, thanks for shouting at them finally.