Feel the same way.
I think if things suddenly take a turn or the worse again then he'll be one of the first to let his head drop.
He's a confidence player which isn't ideal for a CB.
Agree with this. He's got some great stuff to his game and when things are going well then he looks like an assured centre back, but he also seems to have it in him to be shambolic when things aren't so good. That true of all players to an extent, but with Keane it seems more apparent.
That said, you'd hope that a prolonged run of good form in a good team will see him iron that side out of his game.