My thoughts about Hoarder
48m is too short to be useful. You can hear survivors opening chests from around 8-16 m i think? And the "picking up items"-specification only really comes into play if you use Franklin's Demise or in the rare case when they pick up items from dead survivors.
But the perk has good potential to become the "opposite" of Franklins if you buff it to around 96m or 128m ... while Franklins has its uses if all survivors in the Lobby equip items, you could use Hoarder if no survivor has any items, because the probability of chests getting opened is very high in this case. This would make for a decent tracking ability besides the other effect (less rare items).