Summed him up very well. His limitations were disguised with Burnley as his only task was to clear stuff away (by any means necessary, row Z etc.). Playing in a back four that sat deep, and with a midfield four just infront, it left little space for the opposition to operate (thus not exposing individuals and their weaknesses). When he left, Burnley didn’t miss him one iota (in fact they actually got better); it’s the system, not the individuals that make Burnley miserly in defence. In a team that pushes up, much more is required (mobility, ball playing ability, positional sense, and communication w/ the defenders), this has left him exposed big time. Said it before, he’s got the mobility of Steve Bruce but without the football brain of Steve Bruce. I’ve only seen Steve Bruce embarrassed once (by Romário and Stoichkov), with Keane it’s a regular occurrence.
He’s not been “ruined” by anyone, he’s been exposed when more is required.