If that's your average, you're damn lucky. Then again, basing your average on 3 fights isn't really representative. I have done 4 Qilins in a row and got a pouch from 3 of them. I also did over 30 zilart T3 fights before I saw my first pouch. I've lost count on how many zilart T3s I've done by now, but I'm still at a total of 4 only pouches.
You'll notice that I was referring to Heavy Metal Plates, not Pouches. Who does Zilart t3s?

So that makes it ok?
Irrelevant. It is the way things are, complaining about it is akin to paying someone to kick you in the balls, then bitching incessantly afterwards because you just didn't think it should hurt.

But at least Odin never dropped nothing at all. And you could decide one way or another who got what - you didn't see the same person get his 4th Ebody while you still hadn't gotten yours. And you got ichor for each chamber successfully cleared, which you could spend on useful items.
..and you could only fight Odin twice a month at absolute most. How many Voidwatch fights do you think you could do in two weeks? This is what I'm talking about, you're talking without thinking.

Worst case scenario, as it is now I can end up never getting that voidwatch body I want, no matter how many fights I do.
Welcome to FFXI. I'll ask again, are you sure you're playing the right game?