At the first 'Real IT' job I had we started off as Waterfall using Jira. We eventually did transition to agile, and while it was painful, having an Agile coach

At the first 'Real IT' job I had we started off as Waterfall using Jira. We eventually did transition to agile, and while it was painful, having an Agile coach on contract worked out GREAT. Their job was to teach us agile in 6 months and be out. Once we had switched, our Jira workflow was simple. I think it was the same scenario you outline above though; they had enough experience with Jira in waterfall that they knew what to use and what not to use. Which for us was Epics/Stories/Tasks/Tickets/Bugs, Attaching things, linking together (i.e. being able to track that a story was assigned to a ticket submitted by a user/customer was great for communicating with the business about priorities.) But that was about it.