I think some people are over-estimating this thing's capabilities. Less than half the displacment of something like the Fletcher Class destroyer, and only 3 guns of 105mm or 127mm caliber, that aren't AA guns.
For AA defense, they have less than half the firepower of our current PT boats, and around 1/10th that of a destroyer.
And if you're really all that scared, maybe HTC will move/add an '88 or a 17lber so that one of them fires out to sea. But really, a 190 would probably have little problems destroying one with its 500kg bomb.