Morgan isn't the selector, nor did he find these players on trees. England were able to quickly transform their archaic ODI team after the 2015 World Cup because they already the players in the system. The likes of Roy, Bairstow, Hales (let's not understate his contribution in light of the recent events), Buttler, Stokes etc. were part of the system. If England did not have such players at their disposal, they wouldn't be in this position today. Yes having the intent and the mindset is very important, but they are useless if you don't have the right players.
It is very normal for Morgan to get credit from ex-English players and other quarters. When a team plays well, you praise the captain; when a team fails, you criticise the captain. It is standard procedure everywhere. However, every captain needs quality players to win. You make Root or Buttler the captain of this ODI team and nothing will change. Similarly, if England would have stuck with their 2015 World Cup squad, the captaincy of Morgan would not have taken that team anywhere, simply because they weren't good enough.
I will again give example of Ponting and Fleming. Fleming is widely regarded as an outstanding captain and better than Ponting, but it was Ponting who won two World Cups as captain because of players like McGrath, Gilchrist, Hayden, Lee and of course Ponting himself. Give Fleming these players and he would have won the World Cup too, so where does the impact of leadership come into play here?
