I am starting to think that the person we think of as Bluecat, didn't actually make the game that we see here.
Hear me out. What if Bluecat just had some kernel of an idea, a general theme, and then found some people online to do all the work, writing the story and dialog in English, posing the scenes in Illusion Studio, any Photoshop work, converting and saving the graphics files, putting it all into Renpy, minor coding, and then compiling it into a release. Bluecat just took the product and uploaded it every month or so to his Patreon account and wrote a few comments on his Patreon based on what others did. Basically, he outsourced the entire development to other people.
Then, the team member or members doing all the work decided they wanted to do something else, or just flaked out, and left Bluecat with nothing. So, Bluecat is just pretending that he is working on it, but he is really trying to find someone else to do all the work, probably for cheap so he can keep most of the monthly donations, and hasn't had any luck.
The reason we haven't seen any images or any dialog is that there aren't any. Not because Bluecat just had a major personality change, 16 months ago from a prolific developer to a slacker, but because he doesn't know how to create any images, convert files, write decent dialog, or anything else. All he has is a general idea of the theme and story, such that it is, and that is it.
Bluecat is probably the one that translated the dialog from English to German, which is why the German dialog is so bad. It is the opposite of what Skummy has been telling us. He isn't looking for German to English translators, which can be done for free in seconds using Google translate, and some minor polishing by basically any English speaker, but he is looking for someone to write the entire story and dialog in English, create the images, and package it into a game, based on his general ideas (for cheap), which is why he can't find anyone that wants to touch it.
So, really Ecchi Sensei has become a scam of the highest order. Bluecat isn't delaying the release to make more money, or is just looking for another team member to do the translation. There is no Bluecat, in the sense that Bluecat is the developer or team that made the game. The game developers are all long gone, and who people think they are donating to, the developers of Ecchi Sense, is really just the Patreon account holder collecting the money.
I would say at this point this game has about as much chance of coming back as Lexi, where the developer died a couple of years ago (RIP Chatterbox) and a friend of the developer thought they might try to continue, but it just didn't work out.
So, we will all just see more and more outlandish excuses to try to explain, badly, the fact that there hasn't been a single image or paragraph of dialog since October 2020, Bluecat has probably given up even finding a team months ago, and this game will eventually be marked abandoned here. The Patreon account will stay open until the last dollar is collected. Patreon doesn't care if the game is being worked on. Free money, after all.