Having a possible 'open' relationship route with Jessica-Griffin-Raven I think would had both interest and well as possible more emotional depth to things.
Just think...
Jessica-Griffin: If we did somethings with Griffin, and express interest in him, perhaps have the MC hang out with Jessica and blushingly admit we have a crush on Griffin. And given that Griffin has a cock, much to Jessica's current interest at the time, I could see her possibly suggesting experimenting with the idea of allowing us to try things out with Griffin, in exchange of us allowing her to try somethings with him as well. Which could lead to us having a talk with Griffin after practice and propose the open relationship idea between the three of them, eventually leading to threesome content. Maybe with the first threesome being the three of them in Jessica's room, with us blowing Griffin while Jess watches, only for her to join in and 'steal' Griffin's climax from us only to kiss and share his load with us, which could lead to us going down on Jess in return. Another where we get fucked by Griffin while Jessica straddles our face/watches with interest masterbating, letting us take his load first, then gets her dose of the rod, while we watch and maybe join in as well of sores. With other fun ideas as well.
And if we were to date both, seperate dates, and agree to becoming Griffin's 'girlfriend, I could also see a moment where we overhear Jessica talking with some of her fellow girls about us being that and responding that she's okay with it and mentions that while we have changed and are 'semi experimenting', she sees us as both her 'boyfriend' and Griffin's 'girlfriend'.
Jessica-Raven: Granted, there would be some much needed tension between the two, but nothing like a good old fashion hate fucking, with Jessica strapping Raven while we either watch or join in, to get it out of there system. Which could lead to the three of them on the beach, talking things out, maybe going back to either of there places and either eating each other out or strapping either other for fun.
Jessica-Griffin-Raven: Same rules and interests would apply as above, only with extra dialogue of Jessica expressing possible interest in Raven as well. While Raven and Griffin would be hesistant at the start, they would agree to it with the exception of no crossing swords, so to speak. Maybe having a moment with the four of them going to the beach to hang out, only for us to maybe have a emotional moment as we talk about the things we've done between the three of them, having questioning ourselves and doubting our gender and such (more emotional if on trans route), which could lead to Griffin sitting behind us and wrapping his arms around our waist while the girls are on either side of us, joining in on the hug, offering comfort and such.
And maybe a foursome in some hotel, to keep it all a secret, which various exchanges. Like going down on/Plowing/Getting plowed by Jessica while Griffin and Raven watch in interest and make lewd comments, maybe joining in seperately on the two. Sucking/Getting fucked by Griffin while Jess and Raven do the same thing with there mouths/a strapon. Going down on/Plowing/Getting plowed by Raven while Griffin goes down on Jess/fucks Jess along side us.
Just so much potential that could happen and the relationships, while nice, could definately use some expending and opening up. Just food for though
Vim!