Definitely true about young Cyke being hated.. since it's the same character, not a true replacement, not sure what that means, though. And to be fair Marvel has made adult Cyclops a pretty easy target in the past ten years or so. Also, X Men fans hate everything except Claremont and the 92 cartoon (kind of but not really kidding).
People were also pissed about Ben, but he was being sold as a replacement for Peter. Most of the new crop of characters exist alongside the classic characters, and haven't replaced them, yet people still hate them.