Both DLCs for this game feel a lot more competent and well put together than the main game, and since I'd had fun with the main game, I enjoyed playing this too.

For starters, the stories take place in two new, bigger Wild Areas that are actually interesting to traverse.
The topography is more engaging and varied and there are actual compelling places to discover that are either tied into the story or provide actual rewards.
Something as simple as the hidden Diglett all over the map or having to chase the legendary Galarian birds gives the environments more purpose and makes use of the potential that 3D Pokémon has.

They also introduced some nice quality of life features, such as Max Soup for Gigantamaxing, the Cram-o-matic for items and being able to reset a Pokémons EVs.
It does seem a bit weird to make these features that are designed to make aspects of the game less tedious a part of paid additional content though.

I'm a big fan of the whole concept of Dynamax Raids, especially when you do them with other people, as they find a way to make Raid battles more thrilling and get you to strategize.
Having the opportunity to shiny hunt for legendary Pokémon is a nice bonus, even though I didn't spend much time on it personally.

I found the new legendaries to be pretty interesting, both ability- and design-wise.

There's definitely an argument to be had about whether this Expansion as a whole or parts of it should've been included in the main game, considering how the DLC makes up for several ways in which the main game is lacking.
As it stands though, I had a fun time with it and I'm glad I played this.