I think we need time to sum up the all about anyone before any final verdict. Xabi Alonso has the capabilities of doing well. He is a good coach. But according to the circumstances it is also in the hands of Xabi Alonso how to prove himself as the best coach. It is necessary for Xabi Alonso to make Real Madrid able to win the club world cup match. If he succeeds then the future of Xabi Alonso and Real Madrid will be seen at a different level. It's important for both Xabi Alonso and Real Madrid as well. After that the verdict will be clear about Xabi Alonso's performance. And this all needs a healthy time to decide about.
One common thing found amongst football fans and management some times is impatience when a new coach is signed, the expectations skyrockets and everyone wants the coach to perform magic already even when they know too well that he is or has been a good coach at his former team, that patience to give the coach some time to prove himself is often not long amongst most football fans and team management. Xabi is a good coach, a promising one , he has shown that so far, so it will be only fair to allow him all the time before wanting to judge and or compare him because if we do already, we may have bias for which we look at him. It is only best to allow him.