Right now each team has 5 bans, and its not enough, because just as there are strong champions that you want to ban there are also weak champions that you want to ban. So each player should have 2 bans - a ban for the enemy team and a ban for their own team.
It should be like this
1st: ban for your own team - if you dont want to ban for your own team all you have to do is not ban anyone - and then you have the same as today
2nd: Indicate the champion you want to play
3rd: ban for enemy team - Here you ban strong champions
4th: select your champions