Hewitt said: "I was really pleased with the level of skill and enthusiasm from the lads. They worked hard for each other and we've got the rewards.
"We just wanted them to go out, have a go and express themselves and that's precisely what they did."
Jeremy Su'a scored two tries in the first period along with scores from Josh Watkins, Harry Casson and Scotsman Alex Grove.
And despite the weather making conditions difficult, Cavaliers continued to press in the second-half with De Cothi, James Stephenson and Dean Hammond adding to the score.
Hewitt added: "We stuck to the task and showed some great skill in the wet conditions both in attack and defence.
"These guys are growing in experience playing in these matches and it's really pleasing to see."
Despite notable performances from some of the more senior players, the Warriors Academy Manager singled out the youngsters as the shining light from Cavaliers' rampant victory.
He admitted: "It's good to see Grovesy back but it's fantastic to see youngsters like Tiff Eden, Elliott Davies and George De Cothi playing so well.
"Watkins hasn't played in six months and took his opportunity in the first minute well and looked really sharp, Hammond is a class act when he gets going, and Ben Howard and Max Stelling certainly put their hands up.
And Hewitt maintains that the Cavaliers' target is to use the A League platform for the youngsters to showcase their talents.
He concluded: "For us the A League means getting the young academy players out there playing with more experienced guys around them and that's the key.
"We had a good balance tonight with some senior pros and some youngsters and this is a good competition for those young guys to get experience at this level."