Well, No reason for bitterness - it was when Burnley were in the Prem/fighting relegation with us and he said Keane was the better defender. It figures, as others have said - Keane kept Tarkowski out the team there.
We'll soon see.
Someone said Lampard was trying to sign him for Chelsea so he obviously rates him.
Or you could look at it like the season he took over from Keane at the back Burnley finished 7th and qualified for Europe.
A lack of investment thereafter prevented them from pushing on really. He's a captain and leader that should command the defence well, something we badly lack when Mina isn't fit.
A free transfer to make room for the sale of Keane or Mina makes a lot of sense.