Xpantastic!

Yes, this is one annoying omission on the xpander, but easily resolved like you said with the multi-patch.  The simple brilliance of this feature was only something I just realized.  I tend to let my VCOs drift out of tune for a more organic sound, but I realized this would never be like the OB-Xa for example.  
In deciding to sell the OBxa, I decided to see how similar the xpander/obxa could really be.  I set up a multi-patch and changed the osc tunings ever so slightly for each of the 6 voices, and the result was a very pleasing and animated sound.  The ability to change the basic parameters of all 6 voices at once (or individually) from the single page is pure genius...  I'm sure most of you know this, but it was very satisfying figuring out the feature.  Shame you can't also change the modulation parameters as a group, but I guess there's only so much that CPU could do.  

> Right, but there\ufffds difference between M12 and Xpander,- layering all
> the voices (or only 6 maybe) in unison,- the detune page, which the Xpander
> doesn\ufffdt have.
> It\ufffds only a detail, but also a small advantage, being able to select the
> same single patch in every multi-patch slot, setting the voice assignment to
> unison and easily detune all the voices against each other.
>
> THIS is not possible w/ a Xpander,- instead, you have to copy the same
> single patch to six single-patch memory locations, edit each of these for
> different tunings and store, before you\ufffdre able to set up a
> multi-patch-unison-detune sound the way you can do in a M12.
> Will say,- you lose 5 more single-patch memory locations in the Xpander to
> do this, but not in the Matrix-12.