I don't even see low drop rates as a stall tactic. At the rate pickup groups do Voidwatch, even the pickup group organizers are in no danger of capping out on drops between Voidwatch updates. If they doubled the drop rates, that would still be the case. I can count on one hand the number of Bastok/Sandy/Windy tier 4 bodies I've seen drop, and I don't need most of my fingers. Body drop rate on Jeuno Tier 3s seems higher, but weapon drop rates on Zilart Tier 3s may be even lower.

This is an event designed for the 18-man shells that we all happily let fall apart a year ago. Barring re-making them, you're kind of stuck not doing Voidwatch (efficiently/at all).