Is it worth doing this on 15 LC? Haven’t seen enough good feedback as opposed to the 16+
Worst case is you don't like it, then sell it to someone here for a little less than you paid for it. I think it will sell pretty quick here if you drop the price 10 or 20%.
Given how much better it made the throttle response in my 2018, I think it's well worth the experiment for your 2015, even if you decide to sell the PC afterward.