Prior to AAX it was possible to find samples in workspace, then drag and drop them directly into a sampler such as Structure, Kontakt, Battery, Maschine etc. With the introduction of AAX the drag and drop functionality was removed from the AAX format.
Please reinstate it! It is very inconvenient and infuriating to have to find a sample in workspace or timeline, then work out the audio path, memorise it, and go into the plugin and manually load the sample - this is a total workflow killer for anybody doing sample based music or production. The function is already there in the plugins as it works in other formats (for example AU). All you need to do it allow it in the AAX format.