We already have 1 and 6 kind of
1 is a Threesome with Chara, Frisk and Muffet
6 is a reward scene with Chara in christmas costume if you complete the christmas tree (wrapped present)
But yeah, more rpg/gameplay elements like enemies "attacking" the player, more kinky actions to raise hornymeter (with or without clothes), weapons to increase HM faster or destroy chlothes faster, and immersive stuff like point 12. I'd like to see this too, hope someone from the patreon sees this and has the same ideas