The Meta in my area must be different than yours. Most of my opponents have a lot of units in between my CCBarge and their back-field ranged units.
Even when I run up a flank and move flatout my opponents manage to kill BOTH of my Barges before I can charge his back-field units. They do draw and LOT of attention to get destroyed though, which can be a good thing, but they are too fun of a unit to be used just as a distraction.
Then again, I field about 5 Flyers so my opponent doesn't have much to shoot at in the first turn. I am also more apt to get out of the Barge so that I can challenge. I find this more appealing than the D6 'impact' hits from the Barge.
I guess as long as you have the right units to support a CC Barge, than they can work great, but as I do not, mine are now Annihilation Barges only.