Well .. you should not hold your breath ... dev did some tricks with this one already:
”
from the looks of it, the files are (quality vs size) optimized quite well tbh
Can't get it below 50% in size, the optimization in original is good.
Results... done with default Medium Quality Setting in YAC
Original folder size: 1.1GB (1.1GB packed)
Repack folder size: 838MB (712MB packed, duplicate files deleted also)
p.s. there are some duplicate PNG images... if you delete those and edit the script to use WebP, you could save about ~11MB
”