What's the point with that quite lackluster story in Endwalker?

[KageTokage]

It would honestly feel a bit anti-climactic to me if the situation in Ilsabard with the rogue Garlean legions still occupying the provinces ended up just blowing over peacefully.

We were originally meant to have an entire expansion dedicated to sorting out matters with Garlemald, and that could still reasonably happen except we'd be helping the legions who chose to stand on the side of the Populares curb the threat of the imperialists who still desire to rule the continent with an iron fist. Desperation could lead to them becoming an even bigger threat then the empire originally was if Black Rose was any indication.