The 16570 should fit better on you than the newer larger iteration. Unfortunately wrist comfort won't improve with familiarity. 16570 just fits everyone better, even larger-wristed folk. I ask to wear my wife's 16570 from time to time as its 40mm case fits better than my own new Riolex OP39, which I find too large.
Worse is, once something wears too large, it always wears too large. And putting a strap on the larger watch may feel too much of a compromise aesthetically, and against why you purchased the larger watch in the first place.
If I were a pilot I would swap the 216570 for a five-digit GMT in a bezel color of your choice. The coke is nice. Chk