Please do not make group quest open world areas.

[Nektulos-Tuor]

what you're asking for is impossible for ff14.

if they drop useful gear unless they respawn instantly (and players don't just screw over other players) it would be impossible for all players to get gear with how progression works (every 6 months new gear replaces the old)

the only other way would be to make these monsters useless and then you just have annoying strong monsters on the field bothering questing players.

Excuse me, what? Players are supposed to automaticly get gear now? There should be other ways to get the gear, this is just a different playstyle.

And, in Kingdom of Sky they fixed this issue by having each island being separate things. Quests were on the main and some of the side island: Dungeon Islands were separate from quests. They also later gave contested zones a bonus, and each creature was worth 30% of a quest for experience even though they were harder to kill. Making dungeons a viable alternative to dungeons and fates. Except it has bonus experience for being contested.

You need to think about what you say a bit: It CAN be done, and its popular. LOOK at EQ1's progression server!

Gear should be something players should work towards, its not something they should just: "Automaticly Receive"