Bard had terrible control as a SP, and wasn't cutting it, Feliz was converted to relief out of necessity, not because of a lack of dominance.
See, the reason i'm so high on the kid is that, besides following him statistically, i saw him pitch in the summer leagues a couple years ago (as a starter, he threw fastballs, changeups, sliders, the sinker was added last year per an interview done to him by a Dominican reporter, which i confirmed later by reading scouting reports).
No one (not Ubaldo, not Liriano, not Rafael Soriano) produced the sound on the catcher's mitt that Feliz did, not to mention he's fierce on the mound, and he goes right after hitters.
He's a bulldog, and he has filthy, disgusting stuff.
There are some things you can't know about some players unless you follow them regularly, even if through the TV. That kid is something else, my man.