I think y'all are taking a very clever approach by integrating with Jira. Although Jira is not a great experience, it is so sticky. Switching to something else should just be too much of a headache so people just deal with the ongoing, minor headache of Jira itself.
By integrating with Jira, you can greatly reduce the switching costs.
For what it's worth, one reason people get locked into Jira is that all of their previous tickets are there. That historical context can sometimes be super useful. So if your ultimate goal is enable people to switch of Jira entirely, I would recommend looking into whether people want to bring their full Jira history with them.