There will always be a bit of a 'what might have been' with his Liverpool career if he didn't get that injury against Roma. As Jürgen said, he was pretty much undroppable at that time. Unfortunately the team had kind of moved on by the time he was back although he still made some big contributions - off the top of my head I remember big goals at Bournemouth and West Ham when we won the league and also at home to Southampton. Also spoke really well in interviews.
Hope he gets a good move and regular game time.