You can have quality or quantity, you can't have both, unless this is their full time job, which this clearly isn't.
I choose quality, so imma wait patiently.
Also... from what i could find, they only promised content with Mirian this update... and that's exactly what you got. (they also added the ability to walk jay around, which I think has some scenes, but is bugged, go figure for a bug test version tho).
I think your problem is more you had bigger expectations, that were more than what the dev said would be in the next update. Which isn't the devs fault, sure you can say they're slow, but promised more?.... no.