Hugely versatile and great for gathering hide. Tested gathering today with a mate boosted, imprinted pack against an imprinted giga with 400% melee. Hands down went to thylas and not just because of mate boost. They gathered about 5x the amount in the same time, against the same kinds of dinos.
Thylacoleo are capable of pinning down flyers in mid-flight (anything but the Quetz and Wyvern, I believe), other Thylacoleo, and even Therizinos. You can also jump from object to object by holding down the jump button while pouncing from a tree or cliff (have to hit it at the right angle, however). Upvote to inform others!