In certain Creo operation, you need to define references in a set, e.g. when creating round, you define one or more rounds. Creo automatically creates a set of references with the same properties. Now, if you want to define different properties on one of already selected references, you need to remove it from the set and add it to a new set. In case, you need to remove more than one reference from a set this takes a lot of effort, since you need to select each reference, right-click it and Remove it from a set.
Idea for improvement is to add additional command to pop-up menu when you select a reference in existing set, which would allow moving of the selected reference to a new set. E.g. you would select a reference, right-click it, the pop-up menu would appear and by selecting Move to a new set, the reference would be removed from existing set and moved to a new set. In a new set, you could then change the properties of the newly created set.
This would save time and effort by omitting some clicks and make the modifying the model more seamless.