Very large content update such as this one can be sold without a question, and you and i both know that they will never ask a subscriber to pay 5$ for a small content patch and yet you have decided to hijack another thread.
Your concern is legit however don't keep repeating that all this rant is not about 10$ for Makeb, because it is regardless of the way you try to present it, if it were free then we wouldn't be having this discussion would we?
All in all, i will say again, bring on the expansion, i am always looking forward to new content.
Large amount of new content for measly 10$ always tops the option of having no large content updates at all and keeping ten bucks in my pocket.