I actually managed to get it working. For some reason it works when I switch my Hori pad setting from PC to PS3. It changes the behavior of the L2/R2 from a Z-axis to regular buttons or something.
Zack isn't A. He's a solid mid-tier B+ character. Zack's biggest problem is that he is lacking in good footsies. Nothing he has really covers much ground without being risky. He has some, but they just don't compare to the moves you can just throw out like the higher-tier characters. What can...