They cannot be singled out in cc as they are not in base to base contact with an enemy. Also, this isn't a unit designed to go up against a unit of knights or anything else with a high toughness. This is an excellent flanking unit. Also, a toughness buff will make these guys pretty withstanding. Remember: the skinks in this unit are considered "fodder" and a shield for the krox. You want to get your krox in where they can hurt the most. This unit is not a replacement for a saurus unit. But the fact of it being a core unit with krox in them makes it very attractive.
ALso, you are comparing point for point vs. a halberd unit.. of which gets +1 to their str from weapon alone. However, your neglecting to add the Krox stats of s4 t4 l7 and 3 attacks and wounds each. The skinks can also get a stand and shoot option with poison. This unit also causes fear.
There is a lot of debate on the effectiveness of this unit. IMO, the effectivness depends on the general running the army. If you're method is to go toe-to-toe with the enemy unit per unit, then no - this isn't a unit to fit your playstyle. But if you like to support units then this is a great unit to work with. It's fast and hits hard. Not much in survivability unless like I said - you buff it.
And personally, to think people are stupid because they don't agree with your way of thinking is a bit harsh. This unit IS competitive and if someone has put this unit in their army, why wouldn't they have a plan for it?.. thus analyzing their effectiveness.