Liking the new column re-ordering and adding/removal since I last used the platform a while ago.
Had an idea about a "column set" feature similar to the way you have "filter sets".
This would allow you to specify (and set one as default) one or more sets of pre-defined columns that could be switched between on the list the same way you can a filter set.
In our case if we have a list of all phonecall records in the system it would allow to swap between an 'all columns view', a 'summary' view, or 'specific data for a given project' and csv export.
At the moment, we just define different lists with the different columns and either hide and show them based on role or use different forms per role, so its nothing critical, but I thought this could be something to consider in the future.