Another beckerhead!
The mystique of the saber ground bk16 made me really appreciate the GSO 4.1 when I stumbled upon SURVIVE! I just really like the look and certain aspects of a saber grind, BUT if Ethan Becker says that a full flat grind is better for his current bk16, then I can't argue with that.
The ESEE 6 I have never really connected with me, but my bk16 is my favorite full flat grind knife. I think it would be pretty cool to see a S!K take on a ffg.
With a name like SURVIVE! it's not surprising a big focus on most current designs has been towards indestructibility in any situation. Some of the newer, recent designs, like the 4.5, are definitely moving towards what I think you're looking for. Maybe someday we will see a FULL flat grind.