Truthfully, there are no original elements in Wild Savannah slots beyond the graphics. Which also admittedly are built on a familiar theme, with many games having lions and safari style backstories.
Sure, it has nice bonus features. But none are unprecedented. And it pays a lot of ways which we like, but the Megaways mechanism pays more.
But while not original, this game you might say is special in that it’s available only at Stake (i.e. it’s got the exclusivity factor). Plus, it’s simple yet high paying, which is not something you always encounter.