But, the framerate IS low, and a 68k Amiga CAN'T do the game justice (or rather, the versions that exist today for the 68k Amiga don't do the game justice). That is not me being subjective, that is a fact.
How is this not you being subjective? I would like to see the page which says this is fact.
So, yes, I might be subjective on the "playable" matter, but if someone considers the game is done justice on a 68k Amiga, please step up and explain why that is (for any other reason than the one that it is Quake on the Amiga and that it is great that it can be, and has been, done).
Why not turn it the other way around? Your only argument seems to be that the FPS rate is to low, but that would be obvious if compared to the game running on a PC, running the same screensize, etc.
As I see it, playability can't be determined by FPS, only by the person playing.