The Sith Eternal created Snoke for the First Order plan. It is no match for the emperor who possessed absolute power and the power of the dark side. The Sith Eternal did it on purpose.
The powerful emperor was an absolute dictator. It's a burden on the emperor alone, and it's risky. If an unforeseen situation arises for the emperor, it will hinder the operation of the empire. This was an imperial flaw. This is the dilemma of a centralized system.
The Sith Eternal thinks of a system that distributes the burden without relying on the Emperor. In other words, it is the denial of centralization.
So create a deliberately vulnerable dictator Snoke.
Snoke, like the Emperor, doesn't want an insane amount of power.
Therefore, there is no need for an ability comparable to that of an emperor.
He distributes the emperor's assets to his staff and distributes power. Since the phenomenon of burdening one dictator will not occur, the risk will be greatly reduced. The Emperor himself was troubled by the impoverishment and burdens within the Empire, so he increased the authority of Moff-like positions in the Empire to spread his burden. It also greatly reduces the cost of security for the Emperor alone and his subjects. Reduced risk of being attacked.
In the background of creating Snoke, there was a situation in which it was difficult for the Sith Eternals to revive the Second Emperor in a perfect condition. Certainly, it would have been ideal if there was an emperor who possessed absolute power, but since he doesn't exist, we have to assume that he doesn't exist. That is why the next generation of empires was devised that would function without relying on a single dictator.
It was convenient for advancing the First Order in secret. It's not a centralized system, so it's difficult for the New Republic to uncover the truth. Do not adopt a unified chain of command. And since Snoke is not an absolute dictator, the citizens of the galaxy, terrified of the emperor's reign, are reassured that the empire cannot be revived.
Surprisingly, even if Snoke dies, you will be able to assume and deal with it. In every respect, it made us assume the unexpected, more than the Empire. It is possible because it is not a system that puts a burden on one dictator. This greatly reduced the chances of the First Order project being derailed. In the case of the former empire, if the emperor dies, it would be in a critical state of malfunction. Achieving both flexibility and toughness.
The Sith Eternals have overcome the Empire's flaws.
We also wanted it to work with distributed government in case the emperor regeneration fails.