to state you can simply "do the maths" means factors such as rank and acc probably wouldn't need to be shown as a visible increase pop-up on the ranking screen, if you like being consistent with the logic.
unless you're okay with that being inconsistent.
i dont mind either way, though I would prefer to have whatever pp I gained show up with the other numbers, I don't really find it necessary, since yes, we can still do the math -w-
A preferable format for the difference in weighted pp and raw pp would be a visible pop-up like
"+weighted (+raw)"