We get it, removing Normals Draft over Blind Pick stinks. But we all forgot one thing...
New players.
No matter how much Riot actually likes or hates Blind Pick since it promotes anti-teamwork and toxicity, they can't get rid of it. What will happen to the newer players and pre-30's in which most of them have less than 16 available champs? With the increase to 10 bans, players will have to have at least 20 champs available to play, and with Blind Pick gone, these guys have nowhere else to go other than Bots. And we also know how horrid IP gains are in bots...
To put it short, keeping Blind Pick is not just for the sake of having a mode for faster queues, but also for the sake of newer players. Unless we increase free champion rotation to 20 champions, there's no way Riot can get rid of Blind Pick.