Curran, Asutosh and Shashank have to be retained. They will let Curran go is very valuable overall, and if Asutosh or Shashank fail away then they will crumble again. Maybe Arshdeep is another option. 1 foreign player has to be retained and Curran is probably the best bet.
To be honest, it’s fine. True allrounders will bowl anyway. I mean green, Pandya bros, Jadeja, Curran: decent bowlers will still bowl despite being allrounders.