Kroos is considered as the best playmaker in Germany ahead of Gotze, Reus or Ozil. Kroos can play in a midfield of 2 or 3 without problem.
Against Arsenal this year in CL he reminded me a Xavi because he flotted behind their midfield and was so inlfuent on the game. He was marvelous.
Against us, he played deeper like Scholesy did for us those 5/7 last years.
Dynamic or not, he can control the game, the tempo like Scholes did, and if he's avalaible, he's an absolute must for us.
To finish, Van Gaal quoted last week that he loves 4-3-3 and his 3 in the hole must be different. One defensive, one dynamic and one creative. I'm sorry but Kroos is the 3 of that, he can play easily in any system....
So yeah definitely, Kroos would be a major boost for us