To what end would I be baiting anyone? This vehicle has been a disaster from day one and I've gotten nothing more from Hyundai than condescending pats on the head. They have no intention of fixing this car, nor do they care.
Unfortunately, when somebody is not in front of you, their inhibitions go out the window. So, it's nothing for somebody to call the OP a possible troll, and then go on to give advice in the event that they're on the level.
I can concur with your Hyundai experience, some people's experience and their cars have been stellar, especially after the current multi-ecu campaign that you have to ask for by ensisting your drivability issues are there, and you may have to leave your car overnight so they can experience the cold-engine behavior all 2011-12 HSH's exhibited to greater or lesser degree before this latest reflash. If this dealer says no, go somewhere else, open a case with the corporate jokers, keep making noise. This reflash should be a mandatory recall, not a TSB you have to kiss ass for. Ford, for example, is offering a hybrid reflash for all its owners, no ass kissing required.
I can't speak to the exact benefit of the reflash because I no longer own my 2012. But if the responses of almost all owners here are any indication, I would have the car reflashed and then access if the drivability and gas mileage has improved enough to warrant keeping the car.
Good luck, and make sure you walk in armed with the campaign number for this multi-ecu update, and take it to the level of the dealer service manager if the service writers begin jacking you off.
I recently had multiple clicks all the way down and back up the travel of brake pedal in my 2010 Infiniti G37X coupe, and when I walked it, the service writer sat in it for one second and stepped on the brake once. Then he said it's normal. I simply responded that what I'm referring to is not the single click of the brake/shift interlock, and if wants to treat me like an idiot, I can reciprocate, starting with "I want to talk to your service manager or director. At that point, he sat in my car for about two minutes and kept depressing the brake pedal, clearly hearing what I was complaining about. An hour later, he brought me my keys and told me the master tech ordered a new master brake cylinder and booster, and it would be safe to drive until the part arrives. The point is even "quasi-upscale" manufacturers like Infiniti (Nissan) will go out of their way to treat you poorly and shirk a valid warranty claim. Then I hear the Infiniti sales manager crying about how the only part his dealer network that's keeping the doors open for the Infiniti store is Kia and Nissan. I can just imagine what some of these Equus owners are up against, and soon when Kia rolls out their version of the Equus just as they have rolled out the Cadenza.
I've heard horror stories even with Lexus. It's just that you have a better chance of getting good initial quality and a car that will remain tight 3-5 years in. With the Germans, be prepared to put out for extended warranty or trade just as warranty runs out.
For the moment, I'm driving a '14 Mazda 6 Grand Touring what's not a space rocket 9184 HP/185 TQ), but also no slug due to the linear torque curve,. I'n averaging 32 mpg from a non-hybrid, non-TDI drivetrain, and I love the rock solid feel and handling as most reviews concur. Perfect, hardly, but I real enjoy the car. We'll see how I feel in a year or two.