I hate that participant list columns change for all lists, and not just the specific one you're working with. Our participant lists need to show info based on that event, not the same across the board. You should be able to set different info for each list.
Participant list columns need to be "sticky" and custom for each event. For instance, on free events we don't need revenue columns. We always need whatever custom participant options were set up for that particular event. Since the columns always reset to some default, the event coordinators who need to know those custom participant options forget that info is there and the people cleaning the data are frustrated by continuously needing to re-add & re-sort the columns.
If I could set a custom default for each event, that would be even better for our less tech-savvy staff so they can focus on their main role of organizing the event and cultivating the relationships.
Related idea: https://renxt.ideas.aha.io/ideas/RENXT-I-2588