To every pirate or would-be pirate, I have this to say: try your hand at making even a simple, viable computer game, and you'll get why such vehemence is heaped upon you by developers (not to mention the money).
Gods & Kings
I like it. But I like Civ5 in general, if only for the fact that there are no more SOD. Everything else is gravy. Sure, the tech tree is a little linear, but I can finally win a game without having to have dozens of cities scattered across the map doing heaven knows what. It plays much cleaner, has much more focus than Civ4 (which I loved as well). GaK is just the first step towards a fully developed experience ala Civ4BtS.
In its present state it is simplistic, but it is a solid foundation to build upon. Yes, I will probably buy DLC (I think I already did w/ the reptilian civ).
Cost of Gaming
Think of it this way; I coughed up approx. $70 for Skyrim, $60 for Skyward Sword, etc; that's just how console titles are these days. PC titles just spread the cost over time (as far as I can tell). Besides, there are so many discounts so frequently through digital distribution, funding the habit quickly becomes a moot point.