Canada issues sold in plastic pouches

A question for Canadian specialists about the issues sold in plastic pouches. I purchased mine removed from the pouch, but the pouch was included. Are they worth less if the pouch isn’t included?  Are these ever left as issued in the pouch similar to how the unexploded USA booklets are treated? I mean are they considered more desirable sold “as issued?” Or - are they best removed from the plastic to avoid long term problems with the plastics? 

Here are a few examples from my collection. I also enjoy trying to find used copies of all of the perforation varieties ie sides, corners, etc.









A few used singles from these sheets - I need the elusive corners, but it’s lots of fun to hunt for them!