While I generally like positionals, I think DRG MNK and RPR have legitimately terrible implementations of them. DRG and MNK positionals are just a task to check off a list. You can't really play around them or shift them around based on a mechanic, you simply have to do them when they pop up in the rotation. True North on those two jobs winds up feeling like a punishment. Oh, you're playing DRG and you have to hit a flank positional when the boss is cleaving his sides? Too bad! You have no way to delay that positional or work around it. Press True North, idiot. MNK is pretty similar.
RPR is on the opposite end of the spectrum where the positionals are so few and far between (and easy to move around) that it feels pointless to include them in the first place. I don't think anyone would even notice if positionals were removed from RPR.
The other three are fine though, I think.