It's all about arcade these days guys, nobody cares about simulation because so few people buy it.
That said, I spent more time with Vegas 2 than I care to admit. It's far from being the worst game I've ever played, even though the cover system is obviously cheating.
In the presence of hugely popular arcade types like Gears of War, I'm hardly about to expect them to shoot themselves in the foot by releasing another simulation, just for my benefit. They're going to do what brings in the most money.