That's a good idea.
The sampler deck does look like it should be two banks of 8 under each deck - but is one bank of 16.
It's not the most use-able feature in RB TBF. I'd like to be able to drag and drop from the sampler bay to the player for instance - then if I have banks of samples available - I can grab them quite quickly to whatever deck.
Also being able to save and load the banks would be good, as for instance, during a set you can easily use all of the 64 sections - but a trance sample set would be very different from say a Hip Hop sample set!
I have voice over samples for different themed nights, and only use them for that specific night, so it's a bit of a faff changing it. I tend to use playlists instead, but this does mean there's a whole area of RB that doesn't work for me.