did you read the update info on the announcements forum section first? Obviously you didnt. You can put your DL (who used to be a DML) higher up the pitch in the position where he used to be a DML and he will basically be playing as a DML.
(The problem I think could happen with that is that you would want a DL behind the guy in the DML position and the game would think that you are using two DLs and complain with a red exclamation mark icon)