Even if TRob blows up to 12/8 (and I doubt it), I'm still ok with this trade. We simply need a big guy that can body up the opposing center and protects the rim. I don't know if Aldrich is that guy but he has the potential to be. TRob, on the other hand, will never be a big body who protects the rim. So in terms of fit, we just got two guys who fit better next to Cousins.
Don't sleep on Patterson, he has shown some flashes. He certainly has adjusted to the NBA better thus far better than TRob.