Filtering on Map Viewer to show the last created feature only would be very useful. A filter that sorts the features by creation date, then limits the returned values to the top X number of features, rather than an attribute value would be helpful.
My go to method for this is to filter the features by user AND creation date in the last X minutes, which usually filters out only the last created feature for the user, but this only works with newly created points. If the user moves through the workflow more quickly than anticipated, there are multiple features on the map. Equally, if the user gets sidetracked and the filter timer runs out, the point disappears. Being able to display a feature until a new feature is added would be useful.