One idea I saw float around before was the idea of 'coaching' tier. To put my own spin o it, it's a tier that isn't necessarily lower than bronze, but separate, where higher ranked (Let's say, plat and up?) players can coach a player from behind the scenes. Playing with other 'coaching tier' players until they reach silver MMR, where they're left alone to fend for themselves. There would still be the ability to solo que but for those who would like to improve and play instead of troll and rage it would be a good option not only to learn, but surround themselves by like-minded peers and ideally escape the toxic portion of lower ELO ranked play. Not to mention be an awesome way for high ELO players to give back to the community directly.
Would be very hard to implement, but I have a few ideas.
Thoughts guys?
Overall I understand the number of Bronze que being a problem, but with the already established level of bronze play extending the floor I feel won't solve the problem. A lot of times I see people fall prey not to skill level but toxic play, either afk's or raging from people who don't truly want to play. Skill wise I feel people who 'belong in bronze' just get punished for trying to get better when playing ranked, and since the skill level of bronze is, for lack of better phrasing, easy to get to without trying a lower floor will not keep this behavior at bay.
Granted I don't have access to the statistics so I'm biased here, but as I stated above I feel it's less of a problem with skill and more of a problem with attitude.