Ordinarily, when the “Track DSPs” menu is not expanded, you can drag and drop a native effect, VST, or AU into the mixer.
However, when in “more” view, you can’t drag and drop, but only instert an effect by double clicking it and ensuring the correct channel is selected in the mixer.
Wouldn’t it make more sense to be able to drag and drop in both views? This would be very useful.
(Beta3 on 10.4.11, by the way)