@Riot Champion Ban question

Why are you not adding extra ban slots? we sure can use them since we almost hit 130 champions,i dont think 6 bans are enough.. if you take a closer inspection at the ban box,you will see an extra slot for 1-maybe2 champion squares,was this intended?i believe it is like it since the start of the game. If you have an absolute reason to why not add extra ban options,Please can you share with the community?