All players hit a lean patch - especially when they are not called on so often. I think he could invigorate his career under Silva and rediscover his best form. Apparently, he suffered an injury during Barcelona's pre-season tour of the U.S. and may be out until September. That's OK, as it will give him time to settle. It's a 'Yes' from me.
A permanent move would be better - without any buy-back clause!