I was critical of the controls and dual-screen setup in Zero... before I played it.
But they work brilliantly. How quickly someone takes to them will depend on how their mind is wired, though. There are things I pick up quicker than others, and vice-versa. I struggled with hadoukens in Street Fighter and tank controls in Resident Evil for the longest time, while others picked them up instantly. With Zero, things clicked immediately for me but are clearly taking longer for others.
But the setup works beautifully.
They're able to throw so much at you because the dual-screen setup and motion controls allow you to handle it. This kind of gameplay simply couldn't be achieved through traditional means. It's engaging from all directions, how you can fly one way and shoot another, dodging incoming lasers and force fields on one screen while swatting down enemies and turrets on the other screen — including targets that have long since flown out of view on the main screen.
The expanded spatial awareness afforded by multiple perspectives and the incredible speed and precision of the cockpit view opens up vast new realms of gameplay that is meaningful and fun. It's amazing and shows the great potential the WiiU has. Just a bummer they're only beginning to realize its potential now, but hopefully the NX will have a second screen, too.