New Vibration
New Vibration 
If you've replaced the stock rubber bushing with a polyurethane one, you may notice more vibration. Since you've relocated the mounting point from the transmission tail-shaft, to a crossmember which is attached to the body, any vibration is more likely to be transferred into the body. In the stock configuration, vibration would have to go through the torque arm bushing, the transmission mount, and then into the x-member, then into the body of the car. With the relocation kit, it has to go through a firmer polyurethane bushing, into the x-member, then into the body so any vibration is not as isolated. I guess this is just a long-winded way of saying 'yes', IMHO, to your question. 
