Hm. Well I dunno what the dev is doing, but quality takes time. The artistic vision they pore into the custom character poses and expressions for practically every other dialogue line- compare that with some games where the characters have 10 sprites they shuffle through for hundreds of lines of dialogue. Not hating on those games either, different devs have different visions and aspects they want to emphasize.
Can't blame anyone for wanting to see more content or for wanting to be more in the know for the future of the project... but producing content takes a lot of time and energy. That the dev may not have to spare, may not have the workflow to support. It's a sacrifice to toil away alone at a computer... one that we benefit from receiving the product of that. So hopefully that benefit is sustainable. Be it financially, validation, engagement, or otherwise. Nobody wants to get their hopes up for nothing or go all in trusting someone who may be milking them for money.
/ramble