Sorry at one time i would agree but the direction blizzard has taken and the alienation of players concerns and censorship in forums proves my point that game is self imploding and many of my long time wow friends have quit wow, ghostcrawler and the idiots at that company have did there best to dumbdown and you level so fast even at a regular pace the game gets stale.
I see a few things that will lower subs for many games including wow.
The revamped fail ffxiv which now looks and plays so much better and the complete turnaround in that companies way of game delivery to regions which they never did in ffxi and eso might be a sleeper hit, will any of these be a wow killer no, Boredom is what's killing wow and thats why titan is on the horizon in blizzards future that might just be the wow killer another blizzard product.
I see a massive overall improvement in the f2p sto since perfect world as taking over the game seems heading in a the right direction, this game swtor could be big if EA would just unleash BW and let them run rampant and get jiggy with it, but we know ea is a killer of mmo's look at their past mmo titles they managed i guess ea should be proud of pogo at least they got that somewhat right.