Fix labels for ArcGIS Online as it is the face of many projects and datasets and they need to be legible and look good.
Labels do not display correctly when polygons are small in relation to the scale being used in ArcGIS Online. This results in the label not being legible even when zoomed in closely to the polygon.
The labels using MAPLEX work well in ArcGIS Pro, but they do not transition properly to ArcGIS Online.
The work around suggested was to add a transparent point and use the label for that, as it doesn't have the same issue, but this makes the online map pretty messy when users have access to the layer ribbon as well as the legend.