teambuilder is still crap on the wait timers to find a team.
i think you need to make some changes to it. not sure if it would help but i think you should have to be or have support or jungle to host. it sucks joining a lobby where a mid laner the most common role is hosting and has been waiting 30 mins and has noone because noone wants to wait on the adc and supp at the same time due to both roles have 0 patience. since there wont be rewards for playing support or jungle or sometimes adc in teambuilder just make it so lobbies cant be waiting on the lowest amount of players for 30 mins before they become priority lobbies.