MENTOR QUEUE
Something like what i am about to suggest has been suggested before but here is my tweaked version of it.
Why not have a mentor program for new players?
Players could choose to queue for regular / exsisting blind pick OR mentor mode blind pick.
In mentor mode blind pick at least one person on each team is lvl 30 and goldv or higher in ranked. This mentor must also have ZERO disiplinary actions on their account for the season.
All non mentor players will also need ONE or less disiplinary actions taken against their account to use this mode.
All non mentors will play the game like normal, and the expectation will be that the mentor in game can give advice and be asked questions about league and will respond in a non toxic way at all times.
The mentor will have all rune pages disabled and mastery points will be set to the average level of all game participants. (for the sake of being as fair as possible)
After completing a season as a mentor, the mentor should receive one skin of their choice (or maybe a custom skin made just for people in the mentor program?) thus they will have an incentive to mentor.
Plus sides: games will be considerably less toxic.
New players can learn from experienced players in a non toxic environment.
Mentors get a free skin for helping teach new players and make their low level experience better.
Cons: low level players would be playing against at least 1 gold player. However smurfs already ruin low level queues so this is a minimal problem imo.