I think the base game really had some features that never really fully fleshed out and was presented so poorly. For example, the swimming pools. Not much content, could've presented possible orgies between each of the women, but all we got were just pics of lewd actions in the pool themselves. Could've easily had orgies in the showers, one on one sex scenes with each character, maybe including depraved scenes with strangers noting what might be going on in the showers. A lot of missed potential. (I just the thought of almost getting caught)
Another area of missed potential was the grocery store. Sure, we got some animations, even videos, of certain characters having a one on one with MC, but there could be a lot more teasing involved at the store with each character. Giving a tit job in the store is cool, but not really immersive. However, tit flashing is a bit more realistic and doable, and going to the restroom would be more realistic. However, going to the restroom is another feature for the park, so duplicating that in the grocery store would be almost redundant. That leaves it teasing in public. Tit flashing, possibly wearing slutty/revealing clothes, no underwear, bending over, rubbing under/over clothes, or using phallic looking foods to send a message. This would be more depraved with Milfs who have husbands, as they can do these things in the presence of their husbands. Yes, you could do it in front of their kids, but that's kind of the function of the park.
Another area that could've easily seen more content, or just interesting situations, is the dressing room on gym day. Gym day could see content with the class itself. Whether it is making choices to move to a sex scene, or just interacting with Mrs. Jennings to gain her attention. You could introduce dodgeball, fake an injury, have it get checked out by Mrs. Jennings or Nurse Donna (or both for a threesome). The bullies could do something to you (possibly beat you up or pull your shorts down in front of the class), and have what was previously mentioned, or have the bullies' moms come to the school and "apologize" to you. Getting your penis exposed in front of the class can gather the attention of Mrs. Jennings, the bullies, or anyone that the story will involve.
The dressing room is another missed opportunity within Gym day. Whether you want to go in the girls dressing room is up to you, but it is an option. My Main focus is the teacher's dressing room. Sure, you can walk in while invisible and watch Mrs. Jennings change, take a pic, and dip, but I feel like you could do some invisible groping, which will lead to eventual masturbation by Mrs. Jennings in the dressing room.
After the writing of the last section, I realized this could be the story arc of Coach Mary. You could include Mrs. Jennings for Gym day or not, but Replace all the Mrs. Jennings in the last section with Coach Mary. Coach Mary would definitely have a much more confident outlook with what she does than Mrs. Jennings. A Duo would be nice, where Jennings and Mary teach Gym, but Mary is in charge and acts confident in her choices, where that insecurity marked by Jennings husband shows in her gym teaching style.