Best Practices for Structuring Events in Mixpanel

Hey! After 1,5 years of using mixpanel we have teams that haven’t implemented events in a good structured way. Some are outdated and new with new names been added. What is a good practice for starting over? On our side of course, better processes and consistency but on the mixpanel side. Is it best to use hide and merge to not loose old data but still keeping it easy to use for future analysis?