Been thinking that if we can successfully change from the 343 to an effective 4231 mid-season, then we can also do so going from the 4231 to Arteta's preferred 433.
IMO it could give us even greater flexibility and cover regarding starting selections, balance and roles in a 'horses for courses' capability.
Forwards
Stikers = PEA, Laca, Pepe, Martinelli;
Creative/winger = Saka, MO, ESR, Willian;
Midfield
#8/10 = ESR, MO, Saka, Ceballos, Willian;
#8 = Partey, Saka, Xhaka, Ceballos, Willock, AMN, Elneny;
#6 = Partey, Xhaka, Elneny, AMN, Chambers.