Ironically a lot of people wanted Vader 2.0 but didn’t at the same time. They wanted a calm, mature and menacing master of the Dark Side but they didn’t want Vader. That would be a rehash 😉
My problem with it, is that this way we got no actual threat to the main characters, making TFA very boring to me. I would’ve not minded another villain beside him, an actual threat. Giving a more important role to that FO-commander-guy or Snorke, would’ve probably been enough to fix this.
I admit that’s a decent point and that’s why they should have had the Knights of Ren play a major role in the plot instead of just setting them up for future films. This way we can still have Kylo be the Anti Luke Skywalker.
But when I think of it is Kylo Ren really not a threat? I mean as it pertains to what he does to the main characters he sucked information out of Poe’s head which lead the First Order to know that the map was in BB-8, he captured Rey, utterly decimated Finn and dominated Rey for a majority of their duel. The latter two feats were done where his abilities were hampered due to a multitude of extenuating circumstances.
EDIT:
Also he kills Han in the cruelest way possible. Just thought I should throw that out there.