I used KYB quick struts and shocks. No complaints. They made the car handle like new again when I installed them at 80k miles. My ‘13 is my daily driver in excellent condition with 17” wheels and Michelin Cross Climate II tires. Handles fine on winding N Alabama roads. Nothing special though. True stock suspension feeling with a fantastic all weather tire. Don’t believe I spent more than $400 on shocks and struts back in early 2020.
What size wheels does your 2015 have? I have found larger wheels sometimes yield a harsher ride over bumps and uneven pavement. My 17” wheels on stock and KYB suspension has never been harsh and is a fairly soft ride compared to my mother in laws ‘17 GT with 19” wheels (2nd gen is a stiffer ride than 1st gen though, not sure if that’s due only to shocks/struts).