BiS meant very, very little in 2.0-2.1. Secondary stats scaled worse then than they ever have, and if you were a tank then melded Gryphonskin outweighed any jewelry from the Primals or from Mythology (and Gryphonskin was insanely easy to cap). There were some good weapons for those progressing in Coil at the time, like the Dual Haken for gaining accuracy or the Elfin Bow for dropping some (and SS), but that really depended on what your other gear was like and whether you were progressing in Coil at all (whether you'd cleared already or just weren't bothered).

However, I do think that the original HM Primal quest and the original EX Primal quest were the best and most useful ones. The Garuda ring, as mentioned, was really valuable if you were having bad luck in Coil or if you weren't doing Coil at all. The weapon quest also provided something to do weekly to get weapons, and the fights were fun/challenging so it didn't feel like a chore and it felt rewarding. Similarly, the HM Primal quest for your Relic in 2.0 felt really rewarding and once you downed Titan HM you felt like a champ. I think EX Primals got shoved into being used just for filler gear, and while I like Ravana/Bismarck's loot system I don't like that both of them dropped weapons. Once you can clear Ravana, Bismarck no longer matters at all, and that feels really wasteful.

Hopefully they understand what people want out of EX Primals now after we've gone through Ramuh EX and Bismarck EX... but only time will tell. I think the next Relic quest in 3.1 and the EX Primal we get will be indicative of how things will go from here on. Cross your fingers that it's not garbage.