Yeah I think it basically plays out as:
Varsho - everyday CF
Springer/Santander - everyday RF/DH, occasionally both play the corners
Barger - platoon 3B with Ernie, pinch hits often late in games
Straw + Lukes - platoon 4th OF, spell Varsho in the early going if necessary. Lukes used more often to pinch hit, Straw to pinch run
Roden - sink or swim LF. I think he'll be given a few weeks more of rope as a regular LF, and either he succeeds and sticks, or gets sent down to work on his issues in AAA