I also think this would be great way forward. It would bring huge flexibility and with great VST software available nowadays like Toontrack Superior Drums or XLM Addictive Drums they would sound fantastic. This would also offer the opportunity to have separate tracks for each drum instrument and also through MIDI allow simple editing of the drum parts such as adding or removing cymbal crashes and editing velocities.

I am also sure the PG Music team has this as a development plan.