I'll probably replay it in a couple of months/a year, just the main story. Maybe with a challenge to do all missions before moving on to Ch.12.
Treasure Hunter was a pain but doubling the play time is exaggerated unless you have the worst luck or mismanaged everything to hell and back. I had 2 sessions of about 3hrs each killing the Eden turtle for ingots (and it sucked, it's boring and pointless but that's 6hrs, not 60), and about an hour for getting dark matter from Shaolongs and the last two traps I needed from long guis.