For instance, I think perlstyle says you should omit the last ; in a block.

No, that's not what it says at all. It says:

Semicolon omitted in "short" one-line BLOCK.

where "one-line" should be taken to include the curlies, and "short" should be taken to mean something that can be seen as a kind of visual "pill". So it's saying it's okay to omit the semicolon in

    sort { $a <=> $b } @foo;
[download]

but not in

    sort {
         $a <=> $b;
    } @foo;
[download]

So for the most part you're basically in violent agreement with perlstyle.