Revision makes good writing great. Revision is edits that are less mechanics and more description. It is making changes about plot, description, character, setting and other things like that. You can make big and small changes in revision. It takes a longer time than mechanic edits.
During my revisions I changed the story inside the story. I made it more realistic to the time period and place. I also made my sentences more descriptive. My partner didn’t give me edits when everyone else did, but after I remember having to read my un-revised an revised piece. They said that they think that my piece got a lot more description and more realistic.
Happy to hear that your group mates could see the positive change after your revised your work.