I'm pretty sure we will definitely get to bring Scrap home since it's been suggested/hinted at by him literally saying he wants to go with us to Bareshade so he can be more like human's and express himself as he wants instead of just trying to fuck like the other ratkin lol. actually, scratch the pretty sure, he totally will since if he doesn't fans will riot lmao.
Grushk though, everyone wants it. so, it's totally coming sometime, no idea when but it's absolutely going to happen. he is way too attractive and way too personality wise attractive to not get something more. would be fun to see him and Rhot be like "no it's my turn with him tonight" outside while you're trying to sleep and Roushk shows up and is like "wtf are you doing" and he joins in and in the end, they walk in and ask you who can sleep with the MC, and he gets 4 options and maybe a 5th if they all like you enough. those options being Rhot for one Grushk for another and Roushk for the third and fourth being no one cause MC is tired of shit lmao. secret 5th would be all 3.
on the threesome thing, I believe they have a good chance of happening but with Rose I'm less certain. her personality makes it feel like it could prolly happen when her romance comes out, but I don't know. also, rather proud your comment didn't get downvoted to hell because you mentioned sex with a woman, idk why but for some reason everytime I see women and sex or even asking for more women in the comments section of this game it gets insane amounts of downvotes. but also, no her being the best friend type is just her personality, if they get a "this character likes/dislikes you now" after talking they will always have a route in the future. she has one so she will get a route and some scenes, potentially one or 2 with Bernard, Caleb or Logan. Bernard being kinda a 50/50, Caleb feeling the most likely because he's such a flirt and Logan being the least likely but eh maybe it could happen.