You know, these only make any sense if you consider the horrible Prequels actually existed.
If you do not, and avoid what Vader has become in pop culture, he is a towering, imposing figure of oppression, discipline, fear and brutal efficiency that enforced the will of the Empire across the Galaxy.
Often, I find that my friends with the least knowledge in Star Wars (those who do not follow the EU at all, have barely taken notice to Star Wars references in popular culture, etc.) actually have the strongest emotional reaction to such scenes. That, in theory, should affect the "true" fans the most.
As much as we hate the prequels and bash on them for being horrible movies, we are already too damaged by them to sometimes properly enjoy references to our beloved OT.
TL;DR - I don't like Prequel Anakin, never existed. Kylo is awesome!