After thinking about it a bit, I've come to a realization that the main reason people are upset might be because this is being locked behind the Mogstation, with no way to get it aside from paying real money for it. AND that this would be fine were this not a subscription-based game. We pay 12-15 bucks every month and still they ask us for more money.

And then it hit me - what if they made it so that every 3 months you are subscribed to the game, you are rewarded with a couple of points which you can use to obtain items inside the Mogstation? So the Carbuncle mount for example could be obtained after being subscribed for 6 months. I think this would definitely go a long way to calm people who are unhappy with this system.