The new Champion Select is fantastic, but there is only something that it needs to make it perfect
It is not exactly a flaw or something, but it is something that could be added to make it perfect.
Bans are now spread: the last three players ban a champion, with the third pick banning, then the fourth, then the fifth. This is something that everyone already knows. However, Riot could increase the bans to 5 and just let everyone ban what they wanted. This would allow everyone to ban a champion that could counter the champion that they plan to use. It would also allow people to ban more champions because currently there are too many strong champions and not enough bans to deal with them.