I think you should speak for yourself.
So yes, subscribers are upset.
I'm a subscriber and I'm not upset.
$10 is nothing, I paid for the game, I pay for a subscription every 6 months, I pay for a high speed internet connection, and I paid for a computer to mash it all toghether into something enjoyable... AND I can still afford $10 one time for more content than a years worth of updates... AND I'm very happy to pay it.
You people need to get some perspective. If they gave it to you for free and said "there you go, that's next year's content, see you next December" You'd be throwing a fit again. But as it is, you're going to still continue getting new free content all year an you get this for only $10. If you can't comprehend that this is not unreasonable I seriously question how you can even comprehend the task of playing the game.