The point I've been trying to make is that samples are synthesis. They're not your common generated waveforms like Saw,Square,Sine, and Triangle but samples are just as much a part of synthesis.
You can apply a filter to a sample (in most plugins that have sample import) and so on and on. If you view a sample based Osc like you do a Saw wave based Osc then you'll see they are both "synthesis".
Samples wouldn't replace anything just augment Zebra 2 and provide even more "territory to explore"....a lot more.
But after three years of feature requests building up for Zebra 3 no telling what will be added....or when.