From what I saw, Quintana seemed like he was throwing plenty of curves as well as his 90-91 4-seamer. But can't control the count throwing curves all the time.
Doesn't look like he's got much to work with. A chase curve is better when you've got something else you can throw for strikes and challenge guys with. But his 90-91 4-seam fastball doesn't seem to have much life. Looks kind of understandably scared to throw that fastball for strikes. If guys aren't chasing, what can he do?