I think there's always people who are going to be crying no matter what.
Before DLCs were a thing, people used to say they'd love to have extra content for their favourite games. Now when we finally got them, people cry that it's a rip off and it's should be included in the game or released for free. Why would you release something for free when the developers have worked hard very hard to make it as an extra on to of the base game. You can't really ever win 🤷🏽*♂️
I'm personally really excited for it.
Now I'm gonna put it out there, I bought the game when it first came out but I didn't really get stuck into it until quarantine hit. So unlike the people that finished the game months and months ago, it feels new to me and so I'm itching to get new content. So this DLC couldn't come at a better time.
I got over 130 hours off the base game and I'm having fun looking for shinies, breeding strong IVs Pokemon and generally mess around in Gmax raids. This new expansion will certainly breath a bit of fresh air into the game. All in all can't wait.
Also You can buy the pass a little bit cheaper as a prepaid code online. I got mine for £20 off CD keys.