Duo's an interesting case for me, he's kinda like a Submain or something for me... I have fun playing him like Dhalsim in SFIV, setting up fireballs and running crossover teleports on wakeup, along with the corpse-hopping CD crossup and general annoyance with his command-specials. I'm suprised they kept the CD crossup in, in a way; it's such a solid trick, and I DO think it fits his style of gameplay very well, but it looks so glitchy!
I find myself using Stocks much more with him than drive cancels, but he seems best when using both, so I feel kinda bad for him, ha hah.
Anyone out there use Duo as their anchor, with all his solid console changes? He seems like he has the potential, but I rarely ever SEE that happen.
I felt pretty spot-on with him when I got a OCV VS a solid player with him online today, but otherwise, He's just my Alt "battery" slot between he, Mai, and Hwa....