I think some of us are analyzing this so much because the battles were our favorite parts of the books. It is what got me through the slog of Faile's Shaido arc, Elayne's throne chasing, Aes Sedai Tower/Salidar machinations, and Perrin's brooding (all the matters is Faile!). I knew there was another fight coming - Jordan did that so well.
As I said previously, I thought this scene was very well done regarding the One Power fight - though I still don't understand the Black Sisters walking away without killing the defeated Sisters. For my money, they have nailed the One Power between the tower battle and Rand taking out Turak and his entourage - S3 might be the turning point for this specific area.
Though I still worry about melee fighting. With the exception of 'The Blood Snow' there is still a lot to be desired for the mundane weapons - from their appearance to how (un)skillfully they are wielded. But I did like that little blip of Perrin in the trailer though I never pictured him in plate armor.