It’s a good move IMO to bring marks into all the regular dungeons, for consistency’s sake, and get new players used to what they are. And pbag does make sense, thinking about it, for mark.
I think it’s saying that the top tier of chests has some guaranteed pot loot, and then bonus pot chance beyond that, out of the possibilities that the dungeon can drop.
Many quests have reduced their requirements (ie. Manor 5->4, Cem 6->4, Lab 6->4, Lib 6->5, Mountains mix 8->7 from the old Standard tier; & Para 6->4, OT 5->4 from the old Epic tier), though it’s not all one way, (Mwoods 4->5).
Exterminate quest is a bit egregious to remain, perhaps, in the new Mighty tier as it requires a Nest mark but does not offer Nest loot?
I very much like the Clean Laundry quest, that’s a nice little QoL for F2P.
Bear in mind the ‘loss’ does make remaxing easier, since you can stroll around the gift chests drinking em rather than go through mule palaver to bring them across, drop them and drink them. But yeah, something more like 8:3 might’ve been better? As it’ll be annoying to do one quest repeatedly with a full inv. Ah we’ll see.