If there is a problem with the neww 10 ban system, it's not due to 'wasted bans'
Quite a few people seem very angry about the simultaneous picking of bans in the new proposed 10 ban system. Specifically people think that if the enemy bans the same champion as them their ban was wasted. Some think that meta champs being double banned means we aren't really getting 10 bans.
Firstly, enemy bans are Not a good thing. From a competitive standpoint every ban the enemy makes either makes no difference to your team comp, or it hinders you, by preventing a member of your team from playing their intended champion (or a backup champion). Ignoring things such as enemies banning out their own teammates, so they play different champions (aka banning Yasuo) only your bans are beneficial to your team. So we aren't moving from a 6 ban system to a 10 ban system, we're moving from a 3 ban system to a 5 ban system. In the current system if you're lucky and the enemy team bans first, they might ban 2 champs that your team intended to ban before you ban them, and you will effectively get 5 bans, but that will rarely happen, and in any other case, this new system gives your team more effective bans. If someone bans the same champion as you, neither of you 'wasted' your bans, you both got what you wanted, neither of you wanted to deal with that champion, and you wont have to.
Some other reasons people have pointed out this new system is a problem is that 'we need the full 10 bans to keep up with the increase in champions'. However the increase in champion pool is not in itself reason to increase the amount of bans. The small champion pool we had in the past was a limitation preventing us from having more than 3 bans per team. Some have said that more bans would increase diversity in games, and it might; but i think game balance is a far better place to try and regulate diversity then the banning system.
This new system will accomplish what the banning system is meant to accomplish. If all you want out of banning is to eliminate the maximum number of 'strong' or 'meta' champions, you will probably continue thinking that bans are being wasted. However if you want get rid of that champion that you just don't know how to deal with, or counters your champion/team/playstyle, the new banning system will give agency to every player and allow them to do just that.

