First off, Bungie technically did not sell out, the best time to do that would have been under Microsoft. Now, about a better developer, Valve.(Just kidding! They're both cool)
Since Valve left sierra in 99'(was it 2000? Who gives a fuck about sierra.) There has not been a single game they have put out that did not have the fans in mind(Unless you count the 80 or so whores still playing TFC, those unhappy low-tech suns o' bitches.) Anyways, point being, Valve does not 'sell out' and anyways, the term selling out is way to applicable these days, I could say DiCE sold out(They so did, and you all know it, too.) and that BF2 BC and the new BF1943 was a slap in the face. But no, there is no single way that Valve ahs ever not given a damn about us.
Taht said, you can find an updated and you'll always see community request being met in each major update. Additonally, you should also go through the developer commentary, where various anecdotes about the communities response to the game itself, and how valve has addressed it.
Remember that not everyone can be pleased at once, so what seems bad for you, might be good for a thousand others.