Some nice review and interesting workaround for metatags and views. My only concern is that type of thinking is the reason why Drupal in on a fast track to obesity (if it is not already there).

I am not sure if this is even possible but would it be great to have a field on a content type that assign a view to the node? An autocomplete views reference field.

I can think of at least 5 module that won't be needed with such field...