I know that Amorim is so attached to the 343 formation but it's evidently not working and not posing a footballing threat in the EPL or domestic cups, in Europe it can be effective though.
What made Ruud's short spell effective is that he kept things simple, set up players in their better positions and scored goals. If you look back we played 4231 with 2xDMs. I know it was only a few games against Leicester but I would take 3 wins and 1 draw in 4, with 11 goals scored right now! Just look at how complicated we are making tonight against Ruuds Leicester!
I think Amorim would show how good a manager he could be for us by switching it up when the games call for it. 3 at the back against the top teams to grind out a result and then set up more attacking in others, especially at home!