adding 2 more bans that are before all champs are selected is not much of an improvement
Instead more bans should add more complexity to champ select and have 2 bans per team that are after 2 players on each team has pick.
Have you any idea how you can apply this in a strategic manner? You could ban out counters to the champs your team has already selected or target ban a position that has not been selected by the enemy team. Perhaps even destroy that Janna Yasuo Synergy or the Ori-Ali cowball delivery.
And I don't care if players in bronze/silver don't understand how to apply this in a useful way. It is their loss but it is open for them to use.
Adding 2 more bans before any pick however is not really making the game more interesting or strategic. It might be what players say they want but the players who are smart about bans could easily make these bans after a couple picks far more impactful.