For those asking for increase in success after failing:
Basically you are asking the system to be less random or not random at all so that everyone can win. If it is truly random, then expect some people to instantly win and some people to almost never win.
If you want a system that increases your success rate after failing, just ask for a system so that everyone can win in a certain amount of time. No need to talk about RNG.

To that RNG seed discussion:
System time is stored as the number of seconds since 1 Jan 1970, so you never get the same number. But I doubt this is used as the seed anyway, because its pretty simple to do.
Its possible to attach some sensor to a computer to read in randomness from the atmosphere. But I think thats unnecessary for a game like this.
Anyway, this place isn't the place to discuss this because its not only about FFXIV. Anyone looking to argue about that here is just looking to win an argument.