I don't know what effect it would have on LCS tho.
That should not be a priority issue at all. The pro scene should ALWAYS come as a secondary focus when community concerns are expressed. They can learn more than three champions if they're unhappy which would create more diversity. That's already a plus!
I would agree that 6 bans is a bit much, but each person picking the champion they don't want to see in-game is probably the best idea we're going to get. We wouldn't be blaming the trolls that want to ban urgot, poppy, and ashe, and the fresh 30's will need more champions (therefore more time playing the game) before they're allowed to play ranked, and for the impatient, that's more RP purchases from smurfs. Everyone but trolls win - so everyone wins.