John on add the ability to play an audio track in standalone mode

Hi,

your request (which I personally also think is a good idea, if it can be implemented without compromising other stuff) aside; how the host/DAW lets keystrokes through to the plugin, is DAW dependent. There is also a setting in SD3 > General, where you can enable keyboard shortcuts in other hosts.
Dragging from host to plugin is also limited by the host, very few hosts allow this.

BR,
John