I am not judging I am Chevy(and Pontiac) thru and thru. This is field talk at a show that had maybe 500 vettes, and most new 2015. These are the guys that buy these cars every year or two. Overheating auto trans in manual mode is the big one. and surprising to me noisy motors when hot, sounds like a diesel. I am sure GM will fix the problems just saying they might need a few years. I bought a 1st gen LS1, remember piston slap, Broken valve springs. In 2002 they did a motor upgrade and solved many problems.
ps, This is discussion not complaining....