I'm not sure I see contradictions per-se but I can see how that may confuse a newer SW fan. Thing that I agree with him with is the separate thing, yet "continue" the saga so long as it doesn't conflict with anything" part. See reason why I say the EU can't be mingled with the movie SWU is simple for things like not only Sidious but take even Vader.
I'm saying IF he has it's dumb because he doesn't, that's my point. No need to prove it it's obvious.
Your argument is that EU should be separate because it conflicts with the Films. Your evidence is that Vader has lightning. You never said "IF" he has it. You don't have evidence for your point, because writers don't let Vader use Force Lightning generally. The one example where he does use Force Lightning has clear reasoning for why he has it.
@vaeternus: Vader almost never uses Lightning. The one time that he did was because he was using the Kaiburr Crystal which amplifies the Force abilities of Force-Users, allowing Vader to use Lightning without destroying himself. That's the only canon example that I know of.