The Eagles are the only team who seem to have a dispensation to attract players from other Shute Shield clubs due to their country links. I know a few Manly players played for the Rams and a Souths player played for the stars but by and large everyone stuck to their respective teams except those who chose to represent Country. What might happen if Easts and Randwick become too strong is that less country players in the shute shield offer their services to the Eagles.
It is hard to imagine that all 7 U20s from Easts and Randwick will get a start but I don't think they'll go somewhere else. Hanigan and Kellaway will be playing for sure, Newsome, Hutchison and Deegan might get a bench spot at some point but I doubt Tui and Kamp will break into the match day squad this year.
Eagles backline: Faleali'i (or if he continues to play for Rams Angus Pulver), Horwitz, Kellaway, Lance, Carraro, McKenzie (or Hutchison if he continues to play for Rams) and Pat Delit (Maybe Deegan or Newsome or Will Paterson form Easts) They're spoiled for choices really.