Skoll Shorties

Why couldn't The Jailer just take advantage of the chaos that the Dreadlords (And perhaps Denathrius) caused by creating the Lich King and him just use that to accomplish his own goal? Why does HE have to also be behind the Lich King now?

There used to be quite a few villains that did this and having them take advantage of another unrelated situation to benefit themselves showed that they were smart and dangerous. Like Gul'dan. Or Azshara (Ignoring BfA). Or even minor characters like Magatha or VanCleef.

I didn't like the retcon initially and still I'm iffy on it. The main reasons I liked it was it made the Lich King a far more important figure in the lore (at least in regards to the Shadowlands) and it gave a good reason as to why there aren't more LKs.

But does the Lich King need to be more important than he was? He was already a world-wide threat, now they're leveling the concept of the Lich King up to like an agent of a literal universe-ending one. Power scaling for villains just keeps getting worse and it kills tension.

Starting in WoD, every single expac villain has been said to be more dangerous than the last. It starts to make you not care or see them as dangerous when the game keeps going, 'IF YOU THOUGHT THAT WAS BAD, THIS NEW GUY MAKES THE OTHERS LOOK LIKE PUNKS.' Miss me with that.

Haven't they been doing that in every expansion? LK is more powerful than Illidan. Deathwing is more powerful than LK. Garrosh is the exception to this rule (I guess?) Archimonde is more powerful than Garrosh. Argus is more powerful than Archimonde. N'zoth another exception.

Well it wouldn't be Illidan, it'd be Kil'jaeden, which renders that argument moot since he creates the Lich King. But even so, Id argue no. The Lich King and Kil'jaeden would have destroyed the world. Deathwing would have broken it but it still existed in some form in the future.

Garrosh certainly isn't a bigger threat than Deathwing as you say. But then we get Archimonde, who wants to get to Azeroth and destroy it, and then Sargeras wants to literally destroy the world soul, killing the planet. N'zoth is the most dangerous of all actually.