My gut reaction to the "switch" line is that his death is supposed to bring out Pochita to kick off the "eat death" plan. But I'm still not sure if Denji's connection to him is deep enough for that to work

you have the size advantage

I wonder if Fami recognizes that Public Safety's activities and hers are a similar kind of evil, and this is her way of aclnowledging that. not that she feels bad about it, but that it's boring to be around people so like herself

i'm reminded more of this