One of the lads who I work with used to scout for Burnley.
I spoke to him when we signed Keane and he remarked that he is very solid, dominant in the air and a relatively good passer of the ball, without being a John Stones type. He did go on to say however, that the Burnley backroom staff recognised that Keane plays best in a narrow back four when he has the protection of a full back tucked in close. He isn't good when isolated or when needed to go out to the flanks as he has a tendency to loose his positioning/spatial awareness and be easily bypassed. Given how lacking in formation we are currently, our centre halves (whoever they may be week to week) are being pulled into the flanks far too often leaving huge gaps in the middle.
It feels too soon to judge him, particularly given the number of different people he has had playing next to him, but fair to say he is totally lacking confidence at the moment.