It would be really helpful to have a search and replace for event sheets. Maybe right click on a column and have the option to search and replace this column or search and replace all. Or show each one and click through with option to replace or skip. Pretty standard for editing code and could be a time saver.
I always run into bugs because I miss one thing, so even just a search for event sheets would help.
These both exist already, don't they? In the Events tab you can search the current event sheet, and if you press R or right click -> replace you can replace the event with another object of the same type.