Why don't Ramuh EX weapons drop every time when Shiva EX weapons do?

[Estellios]

I always just kinda wished they kept the weapon rate like Ramuh's because I don't like being fed such things. I come from XI where you were lucky if you got anything useful in a huge fight. I'd just like a bit more work involved.

No you don't.

Until Garuda, 1.0 primals gave you dark matter whenever a weapon didn't drop.

Dark Matter is not fun or challenging.