Well its certainly not an easy fight for Leonard, that's for sure. I would expect Ray to win a highly competitive, but ultimately deserved decision.
Just looking at what troubled Gavilan, it seemed to be elite, fundamentally sound movement as opposed to speedy, athleticism based feet. Look at the difference in his troubles vs Bratton and Graham. Thing is, Leonard had both. I think it's the key to him winning a decision, and Leonard isn't gassing out. He has one of the most underrated gas tanks ever IMO.
The last 30 seconds of each round would be entail and display some of the most intense, high-speed exchanges ever.