kimchi fried rice
Even without the "stomping grounds" effect, many of these cards are either better than comparable cards in the apex deck, more flexible/versatile, or create new synergies that were only half baked in the core set. But I most appreciate the expansion of choices in both apex deck construction and things to do on the Game Trail.
There are some Minions/Predators/Menaces/whatever that eliminate prey cards from the Trail. Combine that with a bad event or two and a lot of the prey can get eliminated before you even get a chance to hunt them. The Stomping Grounds cards let you rescue these prey from the Elimination Pile which is helpful for both evolving and VPs. So they come in handy sometimes, but not always.