This was an intriguing video, though of course I personally find being negative towards DOA/DOA6 to be a beaten horse at this point. The fact that this video is pretty well put together is at least mildly depressing. I saw his SCV video before, and it leaves the same feeling of: if the developers don't see this, then what's the point of this video?
These type of videos are good for certain players/newcomers to find out what happened with a specific game in the series, in a way it also preserves video game history. Developing a game that everyone would like is very hard since the developers don't want to stary too far away from their ideas but they also have to take feedback or even backlash into consideration (latter even more so).
Issue is that I don't think that we'll be getting a person who'd be ballsy enough at KT to lead a team to develop DOA7, especially since that person would need to get approval from KT to do so, which is unlikely for the time being (pretty much until their gacha game won't be making money, which it currently does).