When I went to the booth at NAMM, I asked about the pitch tracking, and the guy I talked to said "that's really hard." It was a disappointing answer, I'm really curious about the less CPU intensive pitch tracking mentioned in the posts surrounding this next update and whether it improves the polyphonic tracking. I'm less interested in the synth sounds than the pitch shifting. Synth sounds from a lot of the guitar pedals are a bit too rigid and cheesy to use. Polyphonic tracking is something Boss, EHX, Eventide, iPhone apps and more have been able to do well. I don't know what the hold up is, but this is the only additional feature that I've been actively bothered by with the Helix.
Needless to say, I'm still enjoying the lollipop out of my Helix and just last night was up until 1am showing it off to a friend. So I don't want to be all negative.