Guaranteed drops with a lockout timer would actually be bearable in this case. This leaves the matter of who gets what drop to the shell or group running the fight instead of to the whims of the RNG. Sure, things like politics work their way in there, and players may end up developing the whole routine bit of running everything they can right after reset, leaving those who missed out because of work and other things trying to get a run together the other days of the week.
It'd still be a step forward, because after the abyssmal rates in VW, this last fight should really reward those who participate for working their way up there.