I think Waid as so intent on make Wally distinct from Barry that he deliberately avoided using the classical Rogues (other than Zoom with a twist, making him, for that occasion, Wally's villain, rather than Barry's), prefering to invest on giving Wally his own Rogues, such as Savitar, Tarpit, the Folded Man, Chillbaine (the slew of them, rather than Captain Cold), Kobra (an established DC villain that he tried to make the Flash's), etc... I, for one, think that many of them had a lot of potential. He did seem to have a thing for James Jessie, the original Trickster, though.
Peace