I think it's largely not knowing how to use him. The character is a cool concept desperately in search of an actual role in Picard's story. Any conflicted feelings he might have about Picard got dropped after S1EP4. There was a foundation for a sort of growing-up arc with Hugh and the xBs, but that went nowhere since the writers decided it was more important to give Seven more screentime with the vengeance kill, then forget the xBs existed. And in S2, his role so far is to be the secondary relationship to a secondary character, with an extra layer of emotional manipulation (re: leaning heavily into the "kid" stuff) in an attempt to make his "death" extra sad, since not a lot of attention has been given to his actual character. I actually like Elnor, but it's been pretty obvious that the writers struggle to find a use for him, and I don't know if that's going to improve if they stick with the "everyone is happily back in Starfleet path" post S2, unless maybe there's another time jump to open S3.