Experimentation at this stage of the World Cup cycle is a good thing. It's nearly 2.5 years away before the inter continental playoffs in March 2022. Why not try a few players against Lithuania esp.
That's provided AWs get there out of OFC, as they should.
If Barba's absence creates an opportunity for say Collier, and he dribbles his way past 3 Lithuanians, bangs in a screamer and gets picked up some League One side or something - all to the good.