I feel like Karon is a poor example to use for this since he is the most extreme of extreme players. If you take a look at other players in their rookie years from ranked that weren't so successful like n4rrate (went from ranked to farming t2 immediately, so I count it), primmie (made talon slightly better in his first ever match with them, which is big all things considered), and DRX as well where they were kinda stuck recycling the old players (they look much fresher now and it looks like their team skill ceiling is higher).
Many players (especially in americas and emea) have been around for a long time and are only on the teams because of their seniority and the fact they have been in the scene for a while.
I truly do believe that players in ranked should be given more chances in the scene and it could help rejuvenate many "dead" teams.