I think that stat is pointless and a waste to build gear over it when content is changing and getting harder
My suggestion is to remove looting chance from random stat and replace it with another unused purple stat at random starting from most useful like evasion, crit rate etc.
- add looting chance to team level (ex. 1 lvl = 10 looting chance)
- add looting chance to active token (ex. 500)
I remember there was similar thing in guild wars 2 that was changed later to account buff