The most major improvement from my '19 to my '21 is the transmission... Before I felt like I was jerking off a robot with a broken glass jar. Now it's smooth like a hot knife in butter. o_O
I'm rooting for you, only because something similar happened to me. Bought a used EVO that blew up. Dealership found previous owner dropped in pistons so no warranty was able to be claimed. Had the car for 4 years and drove it in total time of about 1 year.