I'll cast my vote. If I'm outvoted, so be it. I'm enjoying discussions like this.
5.9 for P1. If you look at the MP votes -- I did a grade vote to tick match -- the majority of the 5.8 graders there are confirmed follow for P1. This is not to downplay other people's follow experience or their opinion; it just aligns with my personal philosophy. I use KAYA app extensively to track my 5.11+ and above climbing at the Movement gyms. I never downgrade a leadable climb even if I danced up it on TR because I believe to most people, whether some admit to it or not, there is a difference in their experience between follow/TR and lead. (I would also never rate a climb unless I've climbed it successfully, which does put me in the minority.) There is a vote on MP from Chris. I am confident to say that his grade vote was more about adding PG; less about grade itself. Don't worry. I'm sure he'll correct me if I was wrong. I did not find the route PG, esp. if people go for it with a 5.9 climb in expectation. Another data point: at the end of the same day, I onsighted Burtons Below (5.9) in my approach shoes and felt solid. I would not want to lead P1 in my approach shoes. Well, NOAL rated that route 5.8 on MP. He sure is consistent!
5.9 for P3 (through the bolt). I wanted to say 5.8, but downgrading by two grades might be more than what most people can stomach. I chuckle at myself for saying this because I said it as if there are more than 6 people who cared. Apparently, everyone agreed that it's no harder than P1, so that's that! Would you consider erasing the 5.7 variation on P3? I really don't see anyone who has climbed up from P1 in their right mind would choose to go that way, especially now with a bomber bolt above.