Re the stumps issue, I agree that it was pretty out there but in some ways, though manipulative, it was clever IMO. I think part of why so many of us were disgusted by it is we believe that OP murdered her knowingly and that Roux must also know this and as such it is horribly cynical by Roux and probably nothing less than we would expect from OP.
However, I do have a 'however'! If for arguments sake Pistorius was telling the truth about that night then it would be valid I reckon. There is no denying that he is disabled and were he to be confronted by an armed intruder while on his stumps then he would be very vulnerable. But because we have seen video of him moving much more freely than he did in the courtroom and because we are convinced he has lied and lied and lied some more it is repugnant to us that they would pull such a stunt. I guess I am just doing a bit of lunch break devil's advocating to think of circumstances where it would not be a cheap stunt but since the only one would be if OP was telling the truth and he is not, then yes, it was all pretty off. At least it opened up an opportunity for Nel to fight fire with fire.