Purke's in a tough situation. I think he needs some time off to rest and heal, and clear his mind. Its got to be frustrating to keep taking a couple weeks off to come back and not be full strngth.
I think he's resting, and doing a full rehab of building his arm back up.
Playing in the Cape if confident in his stuff is the best way to maximize his value. But I do think something can be said for getting multiple looks at him in bullpens and medical evals. If he's healthy and has the velocity back up, even in the pen, there's some level of confidence that he'll be good to go.