I reckon the reason for censorship is because this is a [recent] Steam release: the original released back in 2015.
Euuuh ... no. The reason it's still censored is obvious right ... it's localized by Shiravune.
Those guys do NOT de-censor any of their releases ... EVER.
If it were done by Kagura, it'd most likely be uncensored. Be it a recent or an ancient game.
KG has Demon Queen Melissa slated for release in January, so if by "ditched" you mean "stopped working with" - doubt it.
Well, that's not saying much. The contract for Melissa is years and years old at this point. Kagura acquired the game back then, so there's no telling whether or not Acerola ditched Kagura forever.
It's undeniable though that they ditched Kagura exclusivity. After all, if they hadn't, this game woulda come from Kagura, not Shiravune.
We've had a few artists complain about their shenanigans after all. And a few that publicly stated to never work with them again.
I can't help thinking Acerola might feel the same way after they took years and years to get through Melissa after announcing it.
However, in Acerola's case, they actually did finish other games of theirs, so who knows what the relationship status is.