Nah, I personally would've ditched the cougar for something else. a Canadian lynx or bobcat would be more distinct if you absolutely needed a cat for some reason (you don't). And frankly I'd do some even more extreme revisions of the game's current felid roster if given the opportunity.
No way can you have a NA pack without a cougar. It's like having a Europe pack without a red deer or Australia without the red kangaroo.
Pumas are iconic here. They serve as mascots for clothes, sports teams, they are protected in some areas. They have a huge range, the largest in the Americas. And don't forget those screams. Even other videogames use their sounds (like Bowser from Super Mario 64).
Plus, it gives us our 2nd "small cat" after the clouded leopard.
Now, that's not saying I don't want a lynx. I'd love a bobcat, they're beautiful. I saw one 3 times in East Texas, and he (or she) is a beaut. Plus, their low, deep sounds are so frightening