It's like when we played Ake at LB. If we can work the team around it isn't bad as he offers great defensive positioning and recovery he's just not a RB, especially as we seem to be trying to actually play with full backs now.
Lewis was great at RB when he came in because Ake did the same at LB and allowed him to invert, now Lewis looks out of place as he just like Nico is a midfielder so him being a overlapping full back and defending wingers as a last man isn't his game. Thankfully Nico has more size, physicality and his game being a box to box player so what suits being a full back more.
Id love to see Lewis in midfield for that reason and until we buy a RB have Nunes operating as a full back and Khusanov playing right back as basically a wide centre back - like Ake did to great success.
We finally have LB sorted with Nico, Josko and Ait Nouri all being able to play there effectively and Ake being able to cover like Khusanov can the right.