The scene where Longshanks receives his nephews decapitated head

Until you’ve actually picked up a severed head by its’ hair you will never realize how non-eventful it is. I’ve done several and it really was nothing every time.

Well, Longshanks probably "attended" many battles first-hand, so was used to the gore. His son, however, was mostly likely sheltered from birth as well as being effeminate, so there was no hope for him.

I agree that it really was an attempt to make Longshank's son seem more effeminate and pathetic. This was a time when public executions were the norm and bloodshed between the royal families common. Doesn't Longhshanks make a comment about how useless his son is shortly after that scene?