I would rather not reach the semis of the WC with a young MO, than reach the semis and lose with this MO. Because we aint winning jack.
I would rather we try 2 of Gill, Pant and Shaw at 4,5,6 than this sorry lot. I am ok to get kicked out of the WC with these young guns. IT would be valuable experience for the next WC in India.
Also we need to go with a 6th bowler who is a part timer. Even if we play 2 spinners (2 of Yadav, Chahal or Jadeja) and 2 pacers (Bumrah, and 1 of Shami and Kumar) and Pandya, we need to have another part timer to bowl a few overs incase if one of these gets injured. This is where Jadhav is crucial.
The top 3 and Bumrah can carry India to the semis with any middle order. But I think it is too late to bring in Shaw or Gill. They should just go for Pant/Pandya/Jadhav instead of Dhoni/DK/Jadeja.