Since Finch raised the bat for a century against England at Lord's last month he has batting figures of 4/11, trailing off as injuries contributed to the team's crumbling momentum.
Along with the England management he took a year to gather ideas and concentrate his thoughts into a plan for the team, with clear demands for the players and an approach to the game based on attacking cricket.
And Morgan has urged the hosts "to not shy away" from the pressure of the final as "it's a day to look forward to".
But having seen off old nemesis Australia in a one-sided semi final yesterday, confidence is high they can break through the glass ceiling against New Zealand at Lords.
Bayliss, who has been in charge of England since 2015 and led them to the top of the one-day worldwide rankings past year, has a contract until September.
After Australia were all out for 223 in 49 overs, England opener Jason Roy struck a superb 85 from 65 balls - including nine fours and five sixes - as he put on yet another big stand with Jonny Bairstow to break the back of the run chase.
Drafted into the newly created role, Strauss set about an overhaul that saw the former England captain appoint Australia's Trevor Bayliss as coach, and place greater emphasis on white-ball cricket.
And it's apt that the Black Caps are England's opponents on Sunday, as they were the yardstick Morgan wanted his team to be measured by.
"So if England slip up and give them opportunities they will take them, so England will have to bring their A-game to win this World Cup final, they can't cruise along and expect to win it - they have got to play good cricket". Morgan felt at "rock bottom". "Certainly as a captain and as a player, being beaten off the park like that was humiliating".
England have definitely come a long way in polishing themselves up and preparing for this world cup.
But that is unlikely to count for much on Sunday.
If New Zealand are to produce an upset, the battle between Archer and Williamson may well prove to be decisive.
The polite Kiwis have responded by continuing to "scrap", in the phrase of fast bowler Lockie Ferguson, their way to wins as demonstrated by their dramatic 18-run semi-final victory over India.
"Us, as a team, we have learned to enjoy ourselves, particularly days like this, even if they don't go well".
For Australia, the only positive was paceman Mitchell Starc taking one wicket to move to 27 for the tournament, a record for a single edition of the World Cup. I know what it's like to win a World Cup.
"I think that after a World Cup you always start looking and you have one eye towards the next one", he said.
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