Love it. To have a manager who even contemplates this just fills me with excitement tbh. For him to take an already pretty experienced player to a match and say to him, "you could do this", is unconventional but it makes sense! It speaks volumes of both Martinez and Baines as professionals.
Marco, I agree baines is a "phenomenal" () left back but so was Lahm! (RB I know) I'm sure eye brows were raised by Bayern fans when he was played in CM but there is only one way to find out. It's like he's got the player who we know is an amazing full back but he see's more than what he can do at full back and what he can bring to other areas of the field with what he is good at.
I think Alaba has also played CM for Bayern and International level as well so it seems it may be the way football is evolving that we see things like this.