One thing i have noticed is that there are two types of companion tank characters one type is the usual tank that has taunt and taunt everyone around them characters like Khem and Qyzen. Then there are tanks that have threat generation and a taunt but no taunt everyone like Corso and Xalek. I tend to use companions like Corso and Xalek because whenever i cc an enemy, companions like Khem and Qyzen do the taunt everyone around them and break the cc and ruin my attacks up but if I use Corso and Xalek they are smart enough not to break the cc until it does or I do.
Just so you know...taunt does not break CC.
No it doesn't but what he's saying is that their AOE abilities do break CC.