The main problem i think is, that the current form of ME just isnt capable of being that flexible. Many teams, including bayern, nowadays build up with a back three using a FB who moves narrow, a DM to drop in between or both CD's who drop deep to form the back three by involving the keeper. However, that shape primarily is used during build up in their own half. As soon as they approach the final third (in bayerns case) the fullback / pavard will provide width or at least midfield support. Overall, especially top teams, did become way more fluid in their shapes and how players are positioned. Its also impossibel to create fluid interchaning movement between attacking players (yes i know, you can swap positions).