Teambuilder can do one thing better than Dynamic Queue: Allow for uni-role players
Though the chance is remote, there are bound to be a few players who are all "I can't play anything besides top" or "ADC or nothing". Dynamic Queue requires you to be able to play pretty much all roles, as it's up to the computer to decide where you go; you can only pick your PREFERENCE.
Now that Lyte has said that it's bannable to get designated a role but pick another without trading, that makes those uni-role players get screwed. Any thought towards them, or is it a case of "tough luck, play another game"?
EDIT: Found Lyte's words on this. https://www.reddit.com/r/leagueoflegends/comments/41se6w/riotlyte_psa_if_you_troll_and_play_a_position_you/