I'm curious if the POD X3 LIVE has similar features of the Vetta II. Specifically what I'm looking for is if you can program the "expression pedal" so that you can have a clean tone at one end and "roll" the pedal into a different patch/tone (such as a distorted and/or lead tone).

Basically using the pedal to switch between patches. I see that the Vetta II can do this as there is a video of it on the Line 6 website.

If it cannot do this, can it at least be used to control gain on the current tone that is loaded?

Hope I described this well. Thanks in advance!
1979 Gibson Les Paul Silverburst
James Tyler Variax JTV89
Schecter C1 Classic
Ibanez RG520QS
Greg Bennett Torino TR4

Mesa Boogie Dual Rectifier
GSP1101 & Pod X3 Pro
Peavey 5150 & JSX
Bugera 6262 & 333XL
Carvin V3
Spider Valve HD100
It's either volume, or a wah, as far as I know. The only thing you can change on it that I'm aware of is to have it mimick different wah pedals. As for controlling gain, you can use it as a volume pedal and control what is going into your amp, effectively overdriving the preamp, so down all the way would be distorted and back up would be cleaner, but it depends on your amp setup and your total volume output on the board. This would work exactly like a normal volume pedal.