Instead of "Queuing for a role" which clearly doesn't work. You should be able to add tags/markers that point out your capabilities for the roles or for certain champions.
Just giving more information faster would improve the champion select by lightyears.Few examples here
1) The champions would have a STAR if a player chose that champion as his/her "favourite/preferred". And the STAR would have some sort of implication to tell which player of your team has preferred it. This would require players to be able to choose their favourite/preferred champions in their champion lists. This would make picking/banning a lot easier to manage in the set time limits.
2) The players BOX (left side of the champion select) would have color depending what "role" the player is most capable of. If they prefer ADC the box would be red. If they prefer APC the box would be blue. If they preferred ADC/APC equally the box would be half blue half red.
These changes wouldn't enforce the meta but would indicate what the player is most capable of.