[gold stinger]

FFR is 4key rhythm based game, not 8key. The game wouldn't be based around properly trying to hit patterns anymore, but trying to remember which areas of a song constitutes a 'double-tap'. I say leave it as is right now.

It also has a lot more to do than just "getting good scores on jackhammer madness", it has to do with response time, and speed, which is what makes up a large majority of good players. Don't think I'm trying to defend good players in the slightest - the problem is that 100% of players would have to scrap their playstyles for a playstyle that no one has practice using, for the chance of being able to get better scores.

tl;dr using 4 keys for 4 arrows is kind of a given and I don't see why FFR would constitute legibility of using 8 keys instead, or 16 keys, or 32, or a bot.

ps
just like how people started using hands & quads when keyboards started registering more than 2 keys at a time,
accepting 8key setup gives valid reason for charters to create 0-framers on purpose.