What made you the video game developer expert? At launch they were concerned with… wait for it drum roll… launching the game, fixing balancing issues and servers etc…
Guess what Friday the 13th has only one-game mode and it’s been out for years. We knew this was an asymmetrical survival game from the get-go. By devs behind Friday — so most of the community knew what type of game we were getting into.
After playing trial, I never expected them to add more modes. It wasn’t until @IllFonic said they were going to that I was like, cool.
If you’re not satisfied (there’s nothing wrong with that) as I said before take a break, play other games. And when you see new maps and/or game mode(s) hop back over to play PHG.