Those are some heavy bans for Pioneer. Each of those cards represents 1 deck I believe. Now there is a brand new format essentially. The only slight upside is people lost less money than they would have in a modern or legacy ban.
Iam pretty sad to see Cauldron Familiar go, as ive not had any chance play since the March Lockdown, and mono black was my main deck. Hopefully it will get another chance later on, but iam not happy (especially since my LGC will probably start FNM again fairly soon).