I can't help but feel that Kroos has gone from being underrated to seriously overrated. I don't see the comparisons with Xavi or even Pirlo or that he'll end up among the best midfielders of all time.
I think he would be slightly better than Rakitic in our system. He's not necessarily better player, but some advantages Rakitic has over him found little use in our team. Rakitic is fantastic FK taker, but because Messi takes them all it's virtually useless. He also has great long shot, but how many times did he shot from distance this season? Another skill with little use here. In other stats they are roughly equal, but Kroos is better passer. And those are not just short passes, he has great long passes too, certainly better than Rak.
I also believe he'd be able to babysit Alves well too. After all he's playing DM in Real, he's not elite defensively, but Rakitic is not better as DM (after seeing him on that position with Croatia).
Anyway we got Rakitic, so I hope he'll have a chance to show more of his strengths next year. Give him FKs from the left and tell him to shoot more.