I question his work ethic.People have figured out what to do to beat Sylvia, get him on the ground.
Sylvia is still young and will be back. Once he gets a solid ground game he will be sick. With his long legs he could give a lot of people trouble in BJJ when he gets some more BJJ behind him.
I think a guy like Sylvia could really benefit by changing camps. He's been with MFS since he started and a change of scenery and coaching could be what takes Sylvia to the next level.