I'm a Rafa fan. He wasn't perfect and was very frustrating at times, but I liked him.
However, in the end the way he went about things made him a divisive figure at the club. I'm surprises you haven't been shot down her by the guys who usually pounce on any hint of a suggestion that Rafa should come back.
Ideally therefore, when KK does finish I'd like to see a new personality at the helm. Someone who may have built a reputation elsewhere but who ultimately makes his name at our club, stays around for a while and has a legacy to hando down to the next guy.
If such a person isn't available, then Rafa may have a chance. But to have a realistic chance he needs to regain some of his lost reputation by doing a good job elsewhere for a season or two. Otherwise it'll only get more difficult for us to re-appoint him as the further down the line it happens, the more it will appear as a backward step in desparation.