I suppose as long as they keep being showered with money from Steam, they don't really have an incentive to end with that chaotic way of organising the corporation.
Then again, as picky and vocal as gamers can be, would they even want to risk ending up with a less than stellar result? At this point the status of HL3 has become so huge as to provide countless running jokes and cliches. Could they even risk putting out something that wasn't the second (third?) coming?
Remember what happened to Star Wars? Lucas pumped out a prequel trilogy that made a ton of short-term money, but then put a 15 year delay to wash away the filthy taste, before Disney took over and started self-perpetuation engine pumping out enjoyable and massively profitable movies