The introduction of the different sampling rates is a very important feature for professional studios...
Many projects in the video/movie world are still at 48KHz and some prefers to work at higher sampling rates (96 KHz) for better quality.
It's how the converters sounds at different rates that makes the difference. Even top converters like Burl, Prism and Mytek, used in most mastering studios, do sound different just by changing the sampling rate.
So it doesn't matter if the Kemper sounds better or not at higher sampling rates, it's the whole process that is faster and better.
Having the chance to bypass une stage of D/A conversion from the Kemper regardless the sampling rate of the project is for sure very handy, I personally prefer the sound I get coming straight from the S/PDIF, not to mention the fact you have less latency while playing, 'cause you bypass two stages of conversion (D/A from the Kemper and A/D from your converters).
Well done guys!!
Roberto
P.S. If the Kemper could work with an external clock source would be a dream, but I fear it's not possible....