Naw never said Kane's assists were shit - they were just stats. You're might just be a bit sensitive when it comes to Kane. Kane did benefit from Son's finishing at the beginning of the season and stats show that.
But now that Son's turned into Heung Min Bergwijn and Heung Min Winks over the past dozen games or so, Kane's assists had dried up for a stretch of games. Bale's reemergence has finally given Kane the support he needs to truly thrive. Now we're witnessing two legit stars playing at their best.
As far as Son goes, my point is that as long as we have Kane and Bale are on the pitch we'll be fine and can play around with which players best complement them. Kane and Bale will be our two best attackers going forward so long as they are both are fit.
Let Son, Lucas, Lamela, GLC, Dele, and Stevie compete for the other 2/3 spots. Guys like Lucas and Lamela have stepped up, Gio's coming back, and Dele's getting back on track so we've got options.