I really could not wait to see this, I though it was going to be the mother of all Macbeth's. I was disappointed and enthralled in equal meaasure. Like you say he excels at Macbeth the warrior and the action scenes are superb.
He does a great job of restoring Macbeth to his warrior status with the noble death that redeems him, but... and it's a big but, it should be mostly a psychological drama, intense, claustrophobic and dark! the theatricality,style and confidence he has with the battle scenes leave him on the crux of the play, which is all about the Macbeths, their ambition, passion for each other, their subsequent loss and disintegration into madness. Also it's a play steeped in fear of the darkness and the supernaral which was very real not just in Shakespeare's day but most definitely 11th century Scotland, it lacked the right amount of spookiness for me. The absolute key moments/speeches by both of them are flattened and minimilist and way too short, often set in daylilght, when it should be in darkness. This wasn't a fault of the actors who were briliant, more in the direction.
The scenary is a scene stealer:) I kept getting distracted, I know Skye very well and love it, it was a great choice, there is a strange, magical atmosphere there, due to the geology and mists. The music was great, the droney pipes and fiddles were menacing, baleful and gorgeous.
If Justin Kurzel had been a little bolder with the psychology not just the physical it would have been fantastic. Just a wee bit of Orson Wells and he would have been there. Yes I like Polanski's version. I haven't seen Akira Kurosowa's Throne of Blood, but I think it takes the warrior path too.