Not trying to shoot you down here but some of your info is incorrect. Volvo doesn't require the latest "evap kit" which only adds a few more parts but it's highly advised. The kit consists of the evap, pollen filter kit, accumulator (not receiver/dryer) and blower motor air restrictor tape. That kit also adds to the cost of the job and believe it or not, most customers decline to go that route when given a choice as it's more money. The job can effectively be done w/o all the extra parts but it's better to go the suggested route if one plans to keep the car for many years.
As far as the oriface tube is concerned (has no expansion valve), it's never replaced unless there's a specific reason, diagnosed by guages. Most cars never have those replaced as they very rarely fair.
As for the idea of the pollen filter totally curing evap problems as originally thought, not so. This summer we're seeing X70s with leaking evaps, doing one now as we speak btw. Those have the same evaps but they're just lasting a little longer than most did in 850s. I think the pollen filters help a bit, definately keep the evap and ducts cleaner but it's not the total solution either.