Some of the criticism of Son in this thread is fully warranted, but there is a lesson to be learned here for many. Even at his very best, you couldn't rely on him to bring the ball with him. Never a world-class footballer. Never was. Never will be. But goal-and-assist tallies make fools of people.
He's very good, but he's not world class in my opinion; he's too inconsistent for that. I also don't think he's particularly strong mentally, but in some ways I love that about him.
I think he feeds off the energy around him (as most people do) so if the environment is negative like it was when Mourinho was here and still is now then it drags him down too. That's why I think we need to wait another season before we think about moving him on. I think with a positive coach playing more attacking football we'll see the best of Son again. If we don't then let him go next summer.
I think it's unfair to judge our players on this season alone as it's been an absolute mess. Some players have had poor years, but have the potential to do better whereas some players are just genuinely not good enough. Let's clear out the latter before we start worrying about the former. It's going to be hard selling players this summer so we don't want to spend the summer negotiating the sales of Kane and Son then not have time left to move on the likes of Aurier, Dier, Winks and Sissoko.