This sounds similar to the Garlic Coin discussion from a few years ago. They asked me for opinions on the Titans and that the Titans were crowding out the GPUs.
I did some research and found that at a N value of around 14 the Titan would be similar in hashing speed to a 8gb top of the line video card. 16 would be similar to a 4gb GPU. So I recommended they raise the N factor from 11 to 14. Instead they went with a completely different algo to knock the Titans out and the coin totally failed.
Similar thought here: If you think the problem with FJC is that the Titans keep people with video cards out of the game (they do at 11) then bring the N factor up a bit and see what happens. Technically it should make no difference to the current miners, their hash rate will go down but the difficulty will then adjust and they will make the same amount of coin. At a certain level then GPUs can come in and make coin (all of this ignores value as FJC is worth < 1 sat right now) at a level parity with whatever titans are still on.
Or you close the door to the current miners, no one mines with GPU and the coin dies.