Riley's ok. They could do a whole lot more with him, but I agree with the poster who mentioned that the tag division is the way to start.
How about a tag team with Riley & Ryder? Ryder's charisma would help get Riley over and he'd get the chance to de-green.
I'd like to see a Riley/Ryder team. Ryder is arguably treated worse than Riley with the way the WWE jerks him around, and even though Ryder has more TV time, his credibility sadly hasn't increased and it appears forced when he goes up against the likes of Miz (even when Miz has been buried over the past few months).
But I'd also argue that Riley's got plenty of his own charisma and doesn't really need Ryder's. The worst thing that they can do for Riley is make him over into Ryder's "sidekick". The only thing that Ryder could really do for Riley is have him appear on his webshow. It helped Ziggler out a lot and could help other superstars as well.
An eventual Hawkins/Ryder feud could work with Riley running out to make the save from a two on one from Hawkins & Reks, and Riley being there as back up.