You need some massive "hang time" for most cool footwork. A lot of it is done on really awkward weight distribution, which is pretty tough to pull off even with normal weight. There is no physical way she can do that. She's basically doing the best she can with what she's got, and the result is underwhelming at best. Even her musicality is often times totally fucked because her weight is holding her back. Like that transition from back to standing by rolling over her shoulder, you could see the struggle was real. It detracts from the actual dance flow, and is very distracting to the viewer. If she's in any way serious about dancing, she'd quickly see all these flaws herself. A huge motivator for me to stay in shape has always been ability to control my body as much as possible, mostly so I can dance okay-ish.