Brathwaite shot to fame for his heroics in the final of 2016 World T20 when he smashed Stokes for four consecutive sixes in the final over to help West Indies claim their second title in the shortest format but Morgan believes the all-rounder has improved vastly from the incident.
"There was a little bit of rustiness in everything", he said.
'You always get a gauge of how far the ball is going, how it travels through the outfield and it was racing off the ground, even though it was pretty damp underfoot'.
Brathwaite made the breakthrough when he bowled Hales with the penultimate delivery in the final over of the Power Play to put England in a tailspin that saw them plunge to 68 for four in the eighth over.
Jerome Taylor (1/40) dismissed Jason Roy on the first ball of England's reply.
Brathwaite caught England Test skipper Joe Root (17) on the drive off Ashley Nurse.
"I had a chat with a few of the boys in a huddle while Chadwick was getting treatment and a lot of them said it was unsafe", Brathwaite said.
Conditions were soft and slippery, the umpires were close to calling it off actually, ' Carlos Brathwaite said. According to a report in the Daily Telegraph, a section of the floor appeared to have caved in, and there were reports that a female spectator had been injured after falling through the hole.
Earlier, West Indies made 176 for nine. Now captain, Brathwaite encouraged his players to play freely and express themselves while he was speaking at the match venue on the eve of the game.
With just four wins in their last 14 encounters against the World Champions, England will be wary of the Caribbean side which is back to something resembling full strength having welcomed Chris Gayle, Kieron Pollard and Sunil back into the fold after doing without them for long stretches in the past year.
After six overs West Indies had 72 and looked set for 230.
After Gayle was run out in the seventh over, failing to beat Jason Roy's throw from square leg to bowler Liam Plunkett in the seventh over, the rest of the innings lacked the same intensity and momentum.
The 37-year-old has remained part of the Windies' powerhouse T20 team, winning the World Twenty20 last year, and will make his first one-day worldwide appearance since March 2015 in the upcoming series with England.