A new global mod wouldn't be such a bad idea as they could pick up slack in other areas without a moderator, like P&S. I really can't think of a downside to adding new blood to the administration... things seem a bit stale up there.
I am pretty sure I've reported posts in the P&S board and have been dealt with. The only thing is, I am quite lenient when reporting, so if I report some post it is because it is a huge crap, not because it expresses some weird idea.
I'm not sure I like your idea of a specific moderator for P&S. To me there is an essential difference between what you call spammers in P&S and in other parts of the forum like Bitcoin Discussion or the Gambling Section. BaDecker-like forum members and others who write outlandish posts on P&S are not doing it to make money from signature campaings. They write those posts because they really believe in it no matter how odd it may seem to a rational mind.
I understand that if moderation not harsher in that section it is out of respect for the freedom of speech that exists on this forum. As I say I'm pretty sure I've reported posts there that have been deleted, which I can't verify because I haven't reached 300 reports.
I would be concerned that posts in that section would start getting deleted because they are considered conspiratorial, as is happening especially in social media.
There was a time when if you believed that the invasion and war in Iraq was for oil instead of WMD you were a conspiracist. The same if you thought that COVID had come out of a laboratory in Wuhan...
Whoever supports censorship because it suits his political ideas should not complain tomorrow if they censor him too.