I totally understand benching him.
However, I feel like doing that before stage 2 starts just gives no hope to even qualify for champs. Benching your IGL who knows how the team plays and has a year and a half of experience with everyone I feel like is better than bringing on a whole new player who has to get acclimated very very quickly to a new team and how everyone plays. I just think it's better to have Boostio play out the rest of the season and really be sure if benching him is the right call and then bring in Kess if he doesn't deliver with Stage 2.