We have already lost the series. It's time for experimentation. We have got beaten without Rabada and Nortje. Markram hasn't clicked in ODIs yet. Malan hasn't faced quality attack yet in ODI career. But still we were subpar.
Why Ashwin? Just because Jadeja/Axar/Sunder not there. I don't see any reason for Ashwin to be in WC23 sqaud. He will be 38 by that time and serves no purpose to Indian campaign.
Why Bhuvi? Just because Shami is not there. I don't see any reason for Bhuvi to be in WC23 squad either. Bhuvi hasnt performed since years. No swing, no pace, no batting contribution,no line and length bowling. Why he needs to be in team? I don't see any reason. I will better pick full fledged Avesh Khan/Harshal Patel instead of him. He is not a part of test team either.
Why Shikhar? Just because Rohit is injured? I don't see any reason that Shikhar should be in WC23 squad. Ruturaj has proved himself in last three years and still not getting chances. He is in form of his life, if we are not giving chances now,then when?
Rest changes are due to workload management.
Bumrah and Shardul playing each match and we need them for test format. So we need to preserve them.