Ah, those lovely Bridgestones. Once you get some better tires, your car will be a lot better. My first Optima Hybrid had some crappy Kumhos on it, the TC would kick in for just about everything! Seriously. Going into a corner too quickly, it killed the power and slowed the car to a crawl, hit a bump on the road, slowed you down. It was so annoying, I planned on trading the car. Changed over to Pirelli P7 AS+, I n the winter and it was like buying a new car! The performance of the car improved significantly and I could drive the hybrid like a normal car, the manual shifter got used a lot and cornering was more fun but then that let me know I would have to spend more on upgrading the suspension.
You might want to consider getting different tires for winter as those are not good for the winter. You might have seem my post on them in the tires and suspension section. Depending on how you drive, you might want to go with the Michelin PS AS 3+(or another of the top rated UHP AS tires) if you drive spiritedly and want to stick with AS tires all year long. If you want to stick with GT tires similar to the Bridgestones (but with better performance) you can get the Pirelli P7 AS+(get V speed rated ones). They are comfortable, quiet tires that do well in wet, dry and have great performance in snow for an AS tire. The TC issue you are experienceing is due to those tires not being grippy enough. Personally, I feel the GT’s shouldn’t use anything less than UHP AS tires but GT tires are fine if at least V rated, as they would be a bit trippier than H rated tires.
