+1 and mad props to the current progress of dual sampling. This alone is great!
And I totally get it with not making it too complicated. Lord knows less is more. I will say though that if done with that in mind (less is more) you could make it a very simple workflow.
A simple pre-delay knob for the slap-back sound for the Punch. That would help give the punch and the reverb a bit more "pump" feel.
And a clickable "Load" box would not be too cluttered and I don't think you would even need a visual representation of the sample. just a little text showing what sample you chose would suffice. (and when not using any of your own samples, the text field would simply say "init.")
Check out the example I made attached to this reply with a pre-delay knob and the additional load button/sample filename area. =)
