I've defended her before for winning challenges and actually being pretty good at the "game" of Fishtank, but at this point they've totally dropped bullet eliminations and the idea that it's a more straight forward game show. That was really all she shined at, and it doesn't seem like she has anything else left in her. I think in any other season I'd still argue that we should let her cook so to speak, but this season is 2/3rds of the way through and there's only a week and a half left. If she's going to be interesting in any way, she really needs to do something right now today.
I think the nontent pit is probably very hard to get out of from a fish's point of view. If you're not just naturally weird and interesting, like Alex B, the Twins, Landon, then you really need to have something else going on. A charisma or volatility or a willingness to really go there so to speak, like a James Drake or Laura type. Emma just can't sell that kind of thing, she's always the worst actor and presenter and doesn't have the confidence to really sell something to the camera. Even if she snapped awake and went around starting fights and drama with others in the house, it'd be obvious she's doing it to try and do anything at all. I think she's just too much of a blank slate.