So what is the point of requiring 20 champs for Draft normals? Or even for ranked?
Considering we have 5 roles, that's 4 champs per role. Do we really need a player to have this many champs? Assuming the opposing team bans 5 of their champs, that would leave 15... I think the requirement is outdated and unnecessary. Most players focus one or two champs to climb. Let's say we need a couple champs for autofill cases. So 5 possible roles and 10 potential champs. Let's also assume the opposing team bans 5 champs that happen to all be in your champ pool. So add a factor of safety for that. 15 champs seems more reasonable. 20 champs to play even normals seems entirely unnecessary.