I too stayed on Copaxone much longer than I wanted, and only because my DH was freaking out after speaking to the MDs. I say if you slide anyone into a 2T machine, and created a treatment plan of ANY meds, then a year later used a 3T machine, you ARE going to see more lesions! its like using a stronger magnifying glass to look at a painting.
I am sorry you have a new lesion. That stinks. Hugs and prayers from me.