Here are the results I got:
A1200 030/50Mhz 32Mb (Optimised 020 C2P) - 8481 realtics (8.8 fps)
Amiga CD32 68020/14Mhz 8Mb (Optimised 020 C2P) - 18971 realtics (3.9 fps)
Amiga CD32 68020/14Mhz 8Mb (Optimised Akiko C2P) - 12872 realtics (5.8 fps)
So there you go, Akiko DOES work.
It makes a small difference, but nothing spectacular.
Also, when the actual game gets more complicated the amount of time spent on c2p conversion lets smaller and smaller, and so does the performance boost given by Akiko.
In short: Having akiko on existing A1200 systems would give no benefit whatsoever, except maybe in case of an 030 accelerator. If your system doesn't have an accelerator it is really too slow to run the game anyway. If your system does have an 040/060 accelerator it's as fast to use optimized c2p (they
reach copyspeed) anyway.