It's not like he's not scoring ? He's got 10 goals overall, and probably will finish with a few more before it's all said and done.
How many left sided forwards are out there, that are doing it at a similar level, that would be available?
Kvaratshkelia for instance is a fantastic young talent, had a great season last year, but even at his best last year, he had 14 goals, 10 assists overall. This year he's had a significantly worse season, 6 goals and 3 assists.
Diaz, had a significant knee injury and usually takes about a year or so before players get back up to speed post injury. I think he gets probably another year here, before we consider moving him on.