Dude you obviously hit something. Why wait for your tire to blow out before you change it. And if your mechanic tells you it's okay, then you should be looking for another shade tree mechanic. Just saying.
I have the FPTP on my 2017 GT and though I don't drive it daily, I feel that I could. Springs are part of the package. You just have two settings. One setting more for street other setting more for track. That depends on what you want mostly to do with the car. I had the dealership set it up for...