Talkingbackwards, now I understand why we disagree so often: you don't read my posts at all before you reply to them. Now it all makes sense.
A claymore isn't a one-handed weapon and I never said it was. It's not even relevant, but what IS relevant is you think I said so because you simply saw the two words, "one hand" and went "Aaaaaah that's a yes!"

This is why we always disagree, I think, because you simply don't take the time to read it.
As far as Star Wars goes, I have absolutely zero problem with The EU's (expanded universe for anyone wondering) liberal take on SW. It's just an opinion and it really doesn't matter, but I'll be honest and say that the SW universe without The EU would be dull and one-dimensional. Without it we wouldn't have Revan who also mastered both light and dark, we wouldn't have characters like Darth Bane and we wouldn't have the rich history and underlying story of the SW universe without it.
Luke was only mildly interesting because he was Vader's son...that's it. He stumbled into his place among the Jedi, complaining every step of the way. Before his showdown with Vader we see a flicker of the Dark Side take over in him as he tries to strike down the Emperor. We get all excited because we'd love to see him fall, but you know what happens? Nothing. He recovers and then gets his ass handed to him by Sidious and gets rescued by Vader. Luke was instrumental in showing Vader the light, so to speak, and any reverence for him is due to him simply being tortured in front of Vader who brought balance to the force after his self-sacrifice to save his son. Luke is just a USO morale booster for the troops.
The SW purists, while they often have valid gripes about Lucas' decisions in the past, what with the midichlorians and such, are primarily just old middle-aged guys who are quite literally jerking off to their Princess Leia posters and original figurines. They saw the movies as teenagers in the theaters and were captivated and don't want to deviate from what they saw - and more importantly - WHAT THEY THINK should be the direction of SW. A lightsaber with a crossguard, while odd and a bit unorthodox when it comes to even EU SW, is a bold move and shows that there's still life in this old saga.
I personally think it's cool. Also:
NO ONE HAS EVEN SEEN IT IN USE YET.
In the original SW, the lightsaber was to be a sort of neato-hey-wouldya-look-at-that sort of weapon, but what it ended up being was the greatest weapon of all time, fiction or non. Lucas was taken completely by surprise with the reception of the Jedi and the lightsaber because he thought the main draw was the space part of it. We don't know where they're taking this and we don't know how it will be wielded. I personally thought the double lightsaber was pretty meh until I found out about the Sith Assassin and how it's not just a good fit, but it's CRUCIAL to the Assassin's fighting style. Like I said, a lightsaber with a crossguard can only mean it's to be wielded by someone extremely powerful, both physically and with The Force. It's a bulky, long weapon and the Jedi and/or Sith's fighting style must match it. I'm sure the figure in the trailer is a Sith Juggernaut, no doubt about it. The gait, fighting stance, and lightsaber scream a Darth Bane-like Juggernaut. Lightsabers are made by each individual for each individual's fighting style; it's not like we're gonna start seeing nunchaku lightsabers or anything. It's ONE lightsaber held by what is considered the last Sith in existence (or so we're supposed to think). Even if he's not the last, there's only gonna be one more due to the Rule of Two.