I don't think the rite of the nine weapons are unfinished. I mean, they showed the guns with their new looks in the live stream. They probably just didn't have the updated look added to the playable game due to the event not starting for a while. Not really a point to having them in the game yet if they aren't supposed to be earnable yet.
I get that...
It's that the unfinished models made it into the game, meaning the build isn't finalized though those assets are probably done (to your point).
It's the fact that, we were supposed to get One4ALL, Target Lock... but got Hatchling and High Impact Reserves instead.
They're up against that "wire" as I explained... No buffer as all these recent anomalies indicates for.
I'm assuming they added in the base, untextured models of the weapons so that when the even starts, all they have to do is just update the game to add the textures and make them intentionally earnable. Also, did they ever say the first 2 catalysts were supposed to be one for all and target lock? I don't remember seeing anything about that.