Nola has lost both velo and command, not drastic, but enough to give you a sense of what the next five years of his career will look like. He's always had a small margin for error, when he has his command and his 4 seamer can touch 95, he's still a top #2, when he leaves too many pitches in the center of the plate and his FB is 92-93, he's a #4 or so.
Nola doesn't really have a dominant secondary pitch, when he's on it's more a matter of being able to mix four pitches effectively with command, 4 seamer up, 2 seamer on the edge, curve falling out of the K-zone and change ups fading away from LH hitters. Ranger is very similar from the left side. Both have to have top command to be effective. Neither has a Wheeler type rising FB at 97, or a Brogdon disappearing change up, or . . .