Having moved from a Cobra to the Tesla, I can say the issue is different. The main issue with the Cobra was wheel hop, the wheel rapidly gaining and losing traction causing all kinds of stress on the rear differential and half shafts. Reinforcing the rear differential was helpful in making the rear cover more durable. The other issue was crazy hard launches with way more grip than what it was designed to be used for in stock form (drag strip with drag wheels). I only point this out cause my Tesla is crazy smooth in putting the power to the ground in comparison to the primitive (yet intoxicating fun) way the Cobra put power down. I've never felt the wheel hop or anything other amiss in the way the Tesla propels it's way forward.
As a side note - that issue as far as I could tell was never seen as a defect either - just owners taking the Cobra beyond the stock limits it was designed for.
I myself did the reinforcement of the rear cover and later learned the best solution was a Ford Racing cover. That said - it would be interesting if there was a way to reinforce the "engine Mount" with additional bracing.