The kid is underrated around here. We bitch and moan about our transition game, Jones brings exactly what this team has needed all season. But Neanderthal thinking that defenseman need to be big and lumbering is preventing it from happening. His production has translated from NCAA to AHL. He's looked good in the smidgen of NHL time he's gotten. He needs an extended try out in the NHL. Put him with Trouba. Trouba needs to focus on his own end shutting down opposing players. Stop trying to do too much. Put him with Jones. Let Jones retrieve and move the puck. Let Jones pinch and move the puck. That's what he's good at.
"Can't have two". Rangers last won a Cup with Leetch and Zubov. No, Fox ain't Leetch and Jones ain't Zubov. But the idea of not being able to have more than one puck mover is ridiculous. The Devils won Cups with Rafalski and Niedermayer (not huge).
Jones isn't even THAT small. There's no distinguishable difference between 6 foot and 5-11. It's one inch. And the kid is 22 he can gain pounds as he grows.
The rest of the Rangers D are "big" enough and physical enough. I'd be more concerned with mobility than size.