Zogross and the Greenscales had a strong showing in Maryland, going
5-0. However, they didn't face the sorts of armies (ranged commons or disengaging melee, most obviously) that would give that army trouble. So, it's definitely on the watch list to move up, but I'd like to see more results.
If anyone else has results from the C3V/SoV figures in a competitive setting, I'd like to see them. The only other use I'm familiar with is the Zombie Hulks that were used in the Michigan Monster Mash event, but they were played as pseudo-commons with full bonding, so I can't really count those results.