After talking to my Aunt I thought about it in the context of having seen the Grand Canyon, Yellowstone, Bryce and Zion. And of those 5 parks, Badlands was the least exciting of them all. The colors were not as exciting as Bryce and Zion, the landscape wasn't as varied as Yellowstone and it simply wasn't as grand or majestic as the Grand Canyon. It's still a great park, but a little lower on the list of the great parks.
What does this mean, should you skip it? No, I wouldn't skip it. But I would suggest doing it before some of the other big named parks, or at least not on the same trip where the comparison is so easy.