We already have a solution for that:

  if whatever
    ...
  end # whatever


  (p
    ...(bunch of stuff inside p)...
  ) ; p

Now it's optional, not part of the standard, and the language is cleaner for it, while allowing for a way to help your described scenario.

Folks at W3C want to fix all kinds of non-existing problems (like HTML5 canvas when there's already OpenGL viewports).