It’s inevitable for some update to disappoint people, specially if there’s hype involved. While I agree with you in that there are ways and ways of expressing disappointment, I don’t think your opinion should be that biased based on what you pay. They’ll just take the money worth their time elsewhere (funding, coming in-game shop, etc). The devs should, and EHG indeed do, listen to player feedback in order to make the game great, regardless of how much they directly charge you.
I also wanted to remark that LE it’s really not that cheap for a game in beta. In my country, Spain, it costs 34€ (for reference, that’s almost half the Diablo 4 Standard Edition, 70€)
The part of the community that is disappointed with this patch is not because they feel they money is wasted, it’s just that they need to keep waiting for the content they want. Factoring money out of the equation, I think the problem relies on how the hype campaign has been organized, with a big portion of the player base hungry for content for 1+ year. And that’s fine, upset people should be able to express their disappointment respectfully, to make the game better in the future! (take the recent big debate on trading as an example of positive feedback)