Yes indeed, Darwinism, no argument. In Leo's defence (bad pickguards, wrong-way tuners, 2-saddle bridges,etc) - these WERE advances, and also shortage of decent materials for somethings (middle of the Korean War, remember...).
The larger 57 headstock less prone to neck dive? Never, ever, heard of a pre 57 style Precision that suffered from neck-dive***..pretty rare but not unknown on post 57s...although I've never personally come across a neck-diving Fender bass, except the Jaguar...
If I'm seemingly stuck mindlessly with my precisions, it's because nothing else has ever felt right, no matter who made it. And yes, I do like that name on the headstock. I grew up with these being the only good bass around at the time. While that is patently not the case now, I just love 'em, and have yet to see much that is other than minor tweaking, even in the big picture...
Headless? Hmmm...If I could have a 'modern' bass, it would be a Status S2 headless. With a single passive P pickup. That, I would step up for.
So maybe I'm not QUITE the stick-in-the-mud even I thought I was!
***Some modern, basswood bodied versions might, but no originals or Telecaster Basses...