I feel that way myself about a great deal of her later work, actually...not nearly as enjoyable for me, too much "weightiness", often overwhelming the material. Not always, but often enough. I think she lost a lot of playfulness as the years went by, which is understandable, life being what it is and all that...
But this earlier stuff, to me it's like watching a prime young Dwight Gooden pitch, where the body, mind, and spirit are all on the same page, the kid just knows they can do anything they want to, they've got the intrinsic hipness to know what to do, and they revel in their sheer ability to do it as well as what it is they're doing. Or like when Dexter would get into that zone where he felt really good & there were no obstacles...that's what this feels like to me.
Plus, she's sexy as hell here!
It's this type thing when I say, yeah, "Sassy" indeed!