Well, as some of you already know, I've changed mains to MK now because ROB just has too difficult a MU with many higher tiered characters, and his poor MK MU - a character who's very common in tournaments - doesn't help matters, so "fight fire with fire", I suppose. That said, I still use R.O.B. when the situation calls for it, but that's about it now. Still a strong secondary, but I use him less frequently now unless my opponent uses a character who I know R.O.B. can handle well. It's sad to say, but Brawl's physics really does hurt the little robot. Let's just hope Smash4 is much kinder to R.O.B..