Thought of a way this could be done, to make it unique, and easy to implement (relatively speaking):
Allow each of the Osc 3 sample slots to mapped to a specific range on the keyboard. This could be placed on the sample edit page, so up to 8 samples could be loaded, with some even layered on to others, for example:
Osc 3 - Slot 1 - C4-C4
Osc 3 - Slot 2 - D4-D4
Osc 3 - Slot 3 - D4-D4
Osc 3 - Slot 4 - E4-A4
Osc 3 - Slot 5 - F4-B4
Etc.
So this would expand the options, and potentially give more variety to a patch, while not simply copying the “standard” multi sample piano roll option you see with other vsts so as to keep Dune 3 unique.
Might seem like a limitation compared to a full fledged limitless multi sample with a piano roll and everything, but I would view it as a way to add 8 oscillators across the keyboard in the form of samples....
Come to think of it, the mapping could be implemented for ALL oscillators, so that in addition to layering you could get some split keyboard patches going.
I mainly would like to see that split for samples though. Sample layering doesn’t always work too well, so being able to split them would seem to work a little better.