So from reading the letters. Yoshi was saying that the designer of Ifrit wants to make Moogle Primal harder than Ifrit.

I think this is a huge mistake because, the designer is basing it on the fact that hardcore players beat it in 4 days. But the fact is that not everyone is very good at the game.

I think the difficulty if Ifrit is just right atm. Moogle Primal should be designed around the same difficulty but just a different strategy and gameplay, but not more difficult.