Also I think we are overlooking the KHL playoffs factor. Traktor was on the rise at the time and they were spending much to get to the top. Kuz signed partially to help his hometown win the Gagarin Cup.
And he helped to get to the Final. This is well documented. And this is a positive experience. And competitive atmosphere.
Now Traktor has some problems and falling down. Kuz has enough exp about it all: injuries, playoffs, international play, opportunities and the need to seize them. And has some cash also.
Everything is ok to do the next step. If he still can.
PS: I was against him signing with Traktor too.