Yeah, I would think so, too. I guess that production is aware of this issue, too. This year’s TV show is clearly modelled after Promi Big Brother, just on a smaller scale and with some elements of the nightly spin-off.
I’ve read that the research project that they’ve advertised on Instagram came to an end. As I said before, there hasn’t been any major changes. So I’m not sure if they aren’t really interested in changing anything or if the feedback was just not valuable enough. I wouldn’t be surprised if German viewers as a whole don’t even know what they want (as evidenced by the fact that season 5 is probably the most popular season despite introducing a lot of crappy ideas that people rightfully criticised in later seasons).
If there is another civilian season, they should invite a bunch of fans to their offices and do a workshop a couple of weeks before the season starts, so they can make adjustments before the season starts. Might result in a better outcome than doing it once the season launched and when people already dropped out of the show.