Yes and no. Like I said, there's some justification for the figures costing what they do. I remember once when the belt came off my "First Avenger" Captain America's rifle; it took me over an hour to thread the belt back through the clip, so I can't imagine how long it takes to manually dress their super-intricate figures. The Batmobile could likely be ran off a standard toy assembly line like any toy you find at Toys 'R Us; there's just not a whole lot to it.
A metallic paint job is the most obvious omission to me; I wouldn't want it to be Returns glossy, but there's a difference between a metallic black and black plastic. We got unpainted black plastic, as far as I can tell. After that, I would say it comes down to the little details that make Hot Toys figures so incredible. By comparison, their vehicles feel way behind, like they'd be better suited for a Hot Toys figure circa 2008. Aside from the dashboard and the browning machine guns, which are both fantastic, the detailing of the car just feel soft and toylike. Much of that has to do with the inherent design of the car itself, but I would expect Hot Toys to go above and beyond where they could. Take for example the seats of the car; they're nice, but they don't look like 1:6 scale seats - they look like toy car seats. The front headlights, when turned off, look pretty toylike too. How about some bolts and rivets where it makes sense? How about some painted grime and imperfections around the edges where a real car would have them? More beveling and chamfered edges where the panels meet, or where the windshield and canopy meet together. Those kind of small details that a real car has, and that Hot Toys would sculpt into their figures. By comparison the sculpting feels like an oversimplification of the actual car, which is what gives it that "toy" vibe to me, and what makes it feel like a $300 product instead of a $600 one.