Based on Kike's career and recent season numbers, there is no way he should be the lead off hitter.
That said, Cora really has a way with his players, which IMO, is far more important than his on field decisions.
Kike in the lead off spot is working, for now. Maybe not so much for Kike personally, but the Red Sox offense is #1 in the AL in most categories. If it ain't broke, don't fix it. There may come a time when Kike needs to be moved down in the order, but as long as we're winning, I'm good with leaving him there.