It marked England's first victory since they accounted for a CA XI two months earlier in an Adelaide tour match before the first Ashes Test.
"We've managed to distinguish between the formats over the past year-and-a-half or so," captain Morgan said.
"It's worked quite well with both selection and just general feel around the group.
"We want to get the feeling around the one-day group a lot more positive and upbeat in order to play this brand of cricket."
After a disastrous Ashes returned him just five wickets at an average of 115 in England's 4-0 Test series loss, Ali bowled with better control.
He claimed the hosts' top-scorer Travis Dean for 62 when he had him caught at cover and later took his second when John Dalton holed out at cow corner.
"I know he felt as if he didn't quite have the rhythm but, certainly today, his control was magnificent," Morgan said.
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Fellow spinner Adil Rashid claimed three scalps, but England's quick brigade of Liam Plunkett (2-52), Mark Wood, Tom Curran and Chris Woakes all went at more than five an over after Victorian schoolboy Mackenzie Harvey unleashed with a 39-ball half-century.
In his first top-flight senior game, the 17-year-old lifted his fourth ball over third man for six off Wood and struck three more maximums before Rashid had him stumped for 59.
The innings came just over two weeks after the nephew of former Australian allrounder Ian Harvey had hit 136 off 130 balls against a Pakistan under-19s squad.
"Whatever's been thrown at me, I feel like I'm confident enough to play my shots, no matter what the standard," Harvey said.
"Even though it was a full-strength England team, I still felt pretty confident out there and was able to back my skills.
Earlier, captain Matt Renshaw - the only player with senior international experience in the side - blew his best chance to impress Australian selectors ahead of March's tour of South Africa when he was caught behind for 25.
- AAP
