Hmm very interesting posts. Thanks guys.
He seems like he could develop into a WC DM or into a good or very good box-to-box CM with more defensive duties.
Given his characteristics, he'd probably mesh very very well in the absence of Pirlo, adding more defensive solidity to the team.
But I agree with those who say we should go for a more creative player. Juve has a limited budget, and priorities should be targeted first. Getting a good LB/LWB would free Asamoah to bring more or less what Nainggolan can offer.
So with a LWB/LB we could improve this position and improve the mdifield depth, using Asa as a DM or box to box CM occasionally. The problem is it's pretty hard to find a good player on this position available in the world lately. I haven't followed Porto, but Alex Sandro seems like the best we could get right now. I'd really like to see Juve go for him. I'd rather see 15M spent on him than in Nainggolan. I don't know if Porto would deal him for this price though.
I agree we need some AM option from the bench. An offensive minded player, creative, who can give something different to the team. We don't have that option in the bench. Giaccherini was the closest to this.
With Nainggolan we'll have amazing options for the DM/CM position, but limited options in the offensive end - lacking one winger/creative AM, and also a natural born LB/LWB.