The feature “Classics layout” requires control architecture level changes. And most of the pivot table features should be reframed based on the new layout. So, it needs time to roll out the “Classics layout” completely. Due to its complexities and some high priority works, we are unable to roll out the feature in upcoming Volume release (Vol 4). Meanwhile we have planned to complete it on or before 2020 Volume 1 release. So, we will update you once it get rolled out.
We appreciate your patience until then.