On what basis do you say that Caceres has been a "resounding success"? He has played one full game, where he was maybe serviceable but certainly nothing beyond that, and made a 16 minute substitute appearance in another. And Velupillay, while admittedly looking quite good, has only made three substitute appearances for 54 minutes of total playing time, so it is a bit premature to be calling him a "resounding success" also.
Or maybe your definition of "resounding success" is somewhat different to mine.
Compiling passing stats and 1v1s, one evaluates players more closely.
Both V and Caceres are new players.
Caceres
* In the Bahrain game and hi s16 min cameo won a lot of tackles and body on body duels - screening the defensive line. Won as many or more than anyone else playing Socceroo DM in the last three games.
* Caceres passed and moved well in tight spaces , keeping possession in tight spaces, rarely coughing the ball up.
* When Socceroos were in possession, Caceres quickly and proactively moved into position to support the ball carrier. If one compares this aspect of play to Hrustic, the current Serie B player did not do this anywhere near as well as Caceres. Ditto Yazbek, but he moves much more proactively to open passing lanes to support the ball carrier than Hrustic.
Players on the ball looked good passing to Caceres, as he was frequently showing early for the ball by opening angled passing lanes to keep the build up progressing forwards. Maybe Brattan had a baptism of fire against Japan in comparison?
* When Bahrain had the ball, Caceres' defensive running/positioning frequently kept the defensive shape compact - and - timed his sprints well to close down space in team Squeezing plans to dispossess a Bah player , or, force them to turn the ball over to a Socceroo teammate.
Villupillay
* Scored against China - when goals were hard to score for Aus.
* Provided defensive impetus from the front of the pitch in forcing turnovers and winning hard balls.
* Effective off the ball running to open passing lanes. When he replaced Hrustic in one game, I think against Saudi, Aus became more effective playing down the right flank.
* V is only 22-23. It is a young age to play international football.
* V has played quite a few balls into the pen box, or has run with the ball/dribbled into the pen box.
Both players seemed to work in well in a team unit, cohesively, both in possession and without the ball.
For new caps, probably what seemed from left field, I consider them a resounding success.