KenKen has great points. Although it could be said that learning the D-Pad style switching is a hurdle of its own and a great mark of skill, it's just not necessary. I loved the Style system, for what it was worth, but playing DmC, I too don't miss it. They made the somewhat convoluted system, and then streamlined it. I
love having all my combo moves mapped to the same button, and similarly the same special moves mapped to one. Taking combos from ground, to the air, and then back down if I want is much more fun, just because I don't have to use two different buttons depending on whether I'm on the ground or in the air. It's highly intuitive to make your ground combo button the same as your air combo button, and vertical techniques like launchers and droppers on another - while I was perfectly okay with having my thumb dance around the face buttons in DMC3 and 4, I just plain like this better, because it prevents my thumb from getting confused in all the action. Nero's playstyle was a hint of this, and it sucked when I still love Dante more, and had to revert to those somewhat awkward controls.
And people can complain until they're blue in the face about Heavenly Sword's "stance system" being used in DmC, but it also
works. For people to complain that it's dumb to have to hold down a shoulder button during attacks to use a different weapon is insanely silly when these are the same people who want their Hard Lock back, which requires you to consistently
hold down a shoulder button to engage. I found holding a weapon swap button better than tapping one, because the tactile response of knowing I'm holding in the button works a helluva lot better than hoping I tapped a button hard enough to switch weapons. And loving Dante in DMC4, cycling through three weapons wasn't really a treat for me. Requiring a Hard Lock to perform certain moves has pretty much been rendered moot since there is enough different inputs that can be done with the way the control scheme is now, although I hope they also make use of directional inputs and the Special attack key too. Bayonetta had inputs just like DmC Stinger's, and even made use of back-to-foward inputs without requiring a Hard Lock, so we know it can be done
DmC lets me play without forcing me to stop and choose what I want, and just gives me what I want, when I want it, at all times.