I disagree, I think the current approach suits the story better. pairing Mc with the fundanshi and shifting the narrative in that angle would seem too forced imo especially since the story has been told exclusively from the MC perspective up to this point like he is the mc ykno . However, I believe it would work well if the fundanshi ended up with the guy he's about to share a room with, as he fits the typical trope for a BL story (the fundanshi mc in BL).
I know what you said and I have disagreed, mc shines more as an individual character from the start since the BL world has been narrating from his pov, pairing/ teaming up with the writer would come off as forced, beside unlike the mc, the writer seems to be actively pursuing the flags, almost like he's checking off a box in a typical BL storyline, it was about time he got his own story.
not the fundanshi writer getting his own BL story before the MC