To add:

I personally wouldn't mind it if staff were more proactive about punishing good-aligned PCs who kill neutral sentient NPCs with no mitigating context.

For instance, the elemental bishops are technically neutral, but it's not difficult to justify killing them since they're leading an evil cult. Much harder to justify killing wood-elf guards in Evermoon, Tarus, etc.

It may boil down to mechanics, since it's technically difficult to monitor for "bad" neutral kills. If a staff member sees a good-aligned PC with 100 neutral kills, I doubt it's possible to know whether they were "bad" or "okay". So enforcement would probably only happen when someone is being snooped, meaning it would be spotty at best and players would be unhappy when some characters are punished but not others.