i made a bad shot two days ago on a deer that was very slight quartered to. it was a steep angle shot at 50 yards and i had to hold for nearly a minute to get one more step forward. that resulted in slight torque that sent my arrow further back than i've ever hit an animal (just forward of the rear quarter and high)... prior to this the furthest back ever hit by arrow was only single lung and liver. anyhow, i saw the hit and thought i had zero penetration with the deadmeat g5. the deer went forward, spun and proceeded to run like a bat out of hell for over 300 yards. i did not see the lumenock anywhere and still need to go back in daylight to find it. after an audible/visual track job i found the deer 20 minutes later expired. to my surprise there was a clean entrance and exit with no sign of the arrow. i was lucky that the expanding BH cut the femoral artery on the off side.
so far i have also valued flight of the mechanical over performance of the BH but as of late i've been rethinking. this year i tested and carried two different BH's. i think having the confidence and option to take a longer shot when needed with a mechanical is something i'm not ready to give up. i'd like to purchase a few iron will BH's for testing to replace my old thunderheads, which were always reliable.
possibly like you, being a bit of a perfectionist in certain aspects of my life has led me to frustrations with some types of tuning. i have simplified tuning a bit too far since then and relied too heavily on the mechanical flight characteristics but plan to fix that over the next off season.