You're filling in an awful lot of details with assumptions to make your case. Sure, your argument might still be valid once you know exactly how things will play out with Theramore, but you just wrote a mini-dissertation based on one vague statement about the Horde attacking the city.
Rather than telling us all the reasons this doesn't make sense, aren't you a little curious to know exactly what it is you're criticizing?
I personally wish the event wasn't mentioned as early as it was. It gives forum goers like you months to fill in the context however you see fit and pick apart all the details you don't have.
I'm more interested in the Alliance response than the actual Theramore incident. That will be the deciding factor to whether you guys actually listened to the valid complaints made or not.
And that is something you should've expanded on. Not that one of our capital cities was going to be sacked, but how we, as Alliance, were going to stop running.
This is what I'm curious to see as well. If this is handled the same as Soutshore, Gilneas, and every other conflict in Cataclysm then it shows Blizzard doesn't listen to their customers. If the Alliance retaliates, and retaliates HARD then they'll restore my faith in them.