4e Pack Lord: Whenever heroes kill one of its allies it can force one of them to hit themselves, it can move multiple allies forwards, grant them extra attacks
5e Pack Lord: Just regular Gnoll but can recharge one ally's Rampage.
Also played 4e for like 3 months and enjoyed it. But it felt like a spinoff more than anything, and the game DID feel "game-ier". I wouldn't want my long-running campaigns in 4e.