My concerns for Kadri are both his behaviour and his talent. I think he is only a small upgrade on Little. Not big enough to justify his cost. If we lose Trouba and get only a small upgrade at 2C it just isn't worth it.
I think that Trouba for Kadri will never happen simply because Trouba won't want to go there. I'm sure that the only place Trouba will go is where he agrees to sign, and that commitment will have to be finalized before the trade.