New Team Builder

Since rito is revamping team builder, i thought I would drop a suggestion. Stop players from insta-leaving. I have queued so many times, where we need two more players. An adc joins, insta leaves cause team isnt full then literally 5 secs later support joins, then leaves because queue isn't full, rinse, repeat . It is so frustrating and prolongs queue times so much. Perhaps only a 30 sec or 1 min lock, where they cant leave. There is always the option of not pressing ready and leaving if u dont like the team comp.