I'd actually be pretty keen on a 2/6 interface for my live stuff. I regularly use 2 audio inputs (mic for vocoder, analog synth) 1 midi input/output (controller for vstis, samples and analog synth) and 6 outputs (stereo backing beats, stereo synths, samples, vocoder). If you put it all through stereo, your sound guy has no ability to mix it properly for the room or if you've got something slightly wrong. I much prefer that the sound guy has as much control as he/she needs (hence the multiple outs). I use an RME Fireface800 currently, but would love to keep that at home (quite expensive, screeds of inputs/outputs that I don't need live), and have something a bit cheaper and smaller to use live.
*edit* on the other hand, I just googled that device, and not really my thing. I'd need XLR inputs, balanced (And non rca) outputs and modern drivers