Mayo's performance to date has been amateurish, verging on incompetent. The nice-guy shtick is wearing thin, and the fact that he is a nice guy ought to have been seen as irrelevant from the start, frankly. He is a people-pleaser, and Robert was obviously successfully pleased, but this has nothing to do with Jarrod's qualifications for the job. An objective look at Mayo's resume does not suggest at all that he is qualified for the position in which he finds himself, and, though it is early - and that is important - his performance to date suggests the the Krafts ought to have attended more closely to the issues with his resume than to his pleasing manner.
It is certainly to early for any definitive judgment, but I am frankly not at all confident this experiment will work out. It may be that he will find his footing once the games begin, but as I have seen no evidence to date which would support this hope, I am skeptical. If I had to make a judgment at this point -something I would resist - I would judge that he is simply not up to the job.