If it is generally accepted that the leather in new Aero jackets is significantly heavier than vintage jackets, historical accuracy does not seem to be of paramount importance to Aero. It might be sensible to offer lighter zips with lighter leathers to create a jacket indistinguishable from an original, but if the heavier leather is already anachronistic, why not have the option of an anachronistic heavier zip as well.
Personally, I have no problem with the aesthetics of a heavy YKK, and if it cannot last at least 15 years of hard daily use, I would be unhappy.
Your first paragraph is exactly the point I wanted to make, but you beat me to it.
I do agree with Sloan though that bigger zippers aren’t as pretty as the more elegant zippers that aero uses. I think a jacket looks better with the small talon zip as opposed to a chunky YKK. But they’re obviously not as sturdy, especially when paired with heavy CXL. Maybe there’s a middle ground option? Something that’s a bit sturdier while still being somewhat historically accurate?