I shall repost my first ever post from TF.N, which happened to be on this very topic:
Those aren't fights in the PT - They're dance battles with glow sticks. There's no tension to them, no threat and no recognisable style other than 'twirl'. My favourite lightsaber fight is Luke and Vader on Bespin. So tense, two different fighters with two different thought processes. Luke's trying to remained focused at first, very prim and proper... and Vader's just enjoying himself, messing with the new kid, measuring him. And slowly, Luke improvises and then gets worn down, while Vader get's surprised a few times and finally frustrated. The choreography and staging, not just the dialogue, is telling a story. I'm not averse to speeding them up a touch, but preferably not to the speed of the PT battles (I think the aforementioned battle was plenty fast). The second fight between the two (Jedi) has much less of that going on. But damn it, it still seemed like a fight. They were really smashing those blades into one another, aside from some awkward moves toward the end. I don't know why the quality dipped so much.
So, clearly, I voted OT. If they can bring in some of the flourish of the PT while maintaining all I've said above, them more power to them.
(Also, while his is tangential to the topic - make the lightsabers themselves more like those of the OT. So much more vibrancy and danger to them.)