I don't understand the Form user guide

[eluser]plainas[/eluser]
This is exactly where things get a bit blurry. Like.. abstraction is the way and everything but no matter what one does, whatever kind of application we're talking about, there will ALWAYS be areas where abstraction layers overlay.

I follow a bit textnospeech's approach, but that's not always the best. Say you want to pass the view files to a designer, the less black boxes the best.
I guess the answer is: think ahead. Which part of the code is more likely be submitted to changes, how soon, how often...