It's their availability that makes them good tames. They're found all over the place, have poor torpor tolerance, and are quick tames. You can quickly and easily build a huge legion of these guys to take on virtually anything. My pack of around 10-12 once shred a wild rex in seconds. Its corpse didn't even get to hit the ground. They're expendable but fast and strong, a perfect footsoldier.
TLC patch coming March 2018 adding a pack bonus wherein the leader roars and the pack gains damage resistance, movement speed, and attack speed buff for 15 seconds with a 45 second cooldown, will also gain a pounce and pin move similar to Thylocoleo which can be used on small creatures or players. Kill it to escape. Like so people can see!