Look at Rafa's CV. He may be at Newcastle, and he may have been in the Championship last season but he has undeniable pedigree. He's won things everywhere he's been. I'd happily see him as our manager.
CV is very good. However he has only won the EL with Chelsea and Italian cup with Napoli in the last 11 years despite managing clubs expecting to win trophies for nearly all that time, until Newcastle... so you could argue he has had his peak as a manager.