Marco Silva started well but finished badly in his last two appointments. No excuses. Once other teams exposed the weaknesses in his teams, he found no answer to stem the tide of bad results. It would be incredibly nieve to think "third time lucky", should it happen again with Everton. Frankly, he shows promise, but needs to prove that he has the courage to adapt well under stress. So, regardless of past interest, Everton needs to look elsewhere IMO.
Whoever comes in should be able to look first at the quality of young talent presently on the books and be the kind of manager who can develop and help them to fulfil their potential to become class players in the Everton squad.