snookpig, welcome to the forum. A 2012 with 1200 miles on it!!! Gosh, I wouldn't expect any suspension wear at all.
Regarding your issue, in addition to what Don said, what you describe also sounds like underinflated rear tires. First make sure that the tires are inflated correctly (36psi) or even overinflated slightly - primarily to ensure good mileage. What you describe is also a normal response when driving on longitudonally grooved pavement commonly experienced on Interstates, and is the result of zero toe-in/toe-out which the car is set to in order to minimize rolling resistance. The electric steering on the car is excellent, but does 'feel' just a little bit different if you've not experienced it before.
While you're checking things, I presume that the 12v battery has been replaced, but it wouldn't hurt to do a load test on it just to make sure it's up to snuff (especially as it's now winter). Even though it doesn't experience a serious load such as seen with an ICE (Infernal Combustion Engine) vehicle, a weak 12v battery has been the source of a lot of strange issues with our cars over the years.
Good luck to you with your new car, and hope you're experiencing the EV grin!