World Cup 2019: 5 Reasons why dropping Ambati Rayudu was a right decision
On the contrary, Vijay Shankar brings things to the table which Rayudu misses.
2. Strike Rate issue in high scoring games

This is another factor which didn’t favour the right-handed batsman and made him falter in the race to seal no. 4 spot. We have often seen him as an innings builder, but he still needs to work on developing his strike-rate. For a better strike-rate it is important to play aggressive cricket. In England, generally the matches will be high scoring due to the flat pitches. A player who is much aggressive can win the spot. Finally, the selectors saw a match for No.4 spot in Vijay as he plays much faster.
However, Rayadu has failed to do so. He has a strike rate of just 79 in ODI cricket, which is not very impressive. On the other hand, Vijay can play the multiple roles of innings-builder and he tries to keep the scoreboard ticking. This gave him a further advantage over struggling Rayadu.