I was expecting more to be made of where contexts appear: particularly the fact that subroutine arguments are normally list context (you only mention this explicitly for print; the point could perhaps be generalised), and also -- without going into all the messy details of prototypes -- the fact that they sometimes unexpectedly aren't.

(I'm feeling particularly sensitive to that one because I was bitten by it the other day: took me a while to work out why

my @loc = ($offset, $length);
my $part = substr $string, @loc;
[download]

was always just stripping the first two characters from my string...)

On re-reading, I see you may be touching on this in your preamble, but there you refer only to "operators", which I initially took as excluding functions like substr(). So maybe all that's needed is a little clarification up top.