EDIT: sorry for the late reply, thought I had hit send earlier in the day with the post below:
LOL
For what it's worth as a dumbass SoP enjoyer, absolutely the game is genuine and sincere, with the memery being a "death of the author " situation that occurred from second zero when the first trailer was revealed for it (which itself is really funny)
Some of the more moving moments with Jack are either where he is catching himself being an ass or applying that lesson and letting someone else say their peace. That wouldn't be anywhere in the script (in my view) if it wasn't sincere from a writing standpoint, especially coupled with some of the Nojima interviews, it's definitely sincere.
As for Forspoken, I'm still hyped to play it, IRL imploded so probably won't have as much time tonight but I'm excited to jump into it (the cringe framing of the opening hours not withstanding, which while I didn't see it for myself I did read the impressions thread regarding that subject and that's the only part of the game that has me going oof/yikes), aside from how they assembled the writer's room and opted not to change it once they found their lead in Ella. I'm pretty sure by the time the game is done I'm going to want to see more Frey down the line and I hope we get that chance.
EDIT2: And yes SoP still gets hate, I saw people hating on the Gilgamesh DLC trailer when it dropped calling it dumb and stupid, heck people complained about the music (which is insane to me but w/e). I don't say this to minmize what I see as an outsized disdain for Forspoken though (because in my view it very much feels like Forspoken is under a microscope), but rather because despite my dumbass enthusiasm for SoP it absolutely didn't sell well because if it had SE would have crowed about it. Even FF fans absolutely hate it.