Hi, first, thanks for your effort
I play on AMD processor so I probably do not experience the "real" FPS bug. However, I always have severe FPS drop at the end of Upper Edo castle, where the unique mad oni crusher is. Unfortunately, it occured with your augmentrex on too. So I guess, it is different issue?
I started the game from the augmentrex, log looked okay, so I guess it was active at that time or is it necessary to toggle it on with the command?