If memory serves me right, I think Tony actually used a 4-2-3-1 formation in his last season with Stoke and in our first pre-season match so maybe he has it as an option in his ideals. I could be wrong though.
If we can't sign Praet then I still think Morrison has a lot to offer us in an attacking midfield position. He was at his best under RDM and Clarke playing in that role and his energy mixed with the youthfulness and skill of Gnabry and the goal scoring attributes of Berahino and Rondon could make a fruity cocktail. Don't forget Sessegnon either because his best performances for the club have been in that role.
All in all changing our 4-4-2 to either a 4-2-3-1 or 4-1-4-1 is something that needs to be done in my opinion.
If we can't sign Praet then I still think Morrison has a lot to offer us in an attacking midfield position. He was at his best under RDM and Clarke playing in that role and his energy mixed with the youthfulness and skill of Gnabry and the goal scoring attributes of Berahino and Rondon could make a fruity cocktail. Don't forget Sessegnon either because his best performances for the club have been in that role.
All in all changing our 4-4-2 to either a 4-2-3-1 or 4-1-4-1 is something that needs to be done in my opinion.