I wanted to express in simple math how awful a 1% drop rate is in this game.
Let's use Leviathan EX as an example. Mirror of the Whorl appears to be a 1% drop rate. Certainly I've gotten over 100+ wins and I've only seen one. Ever. Most people seem to think it's a myth. Certainly it's nowhere near as high as 10%, or even say 5%.
To illustrate just how awful 1% are, let's assume that instead of being the random chance that it is, it's an eventual "force pop" (for example, if something was 20% chance of dropping, it would drop on the 5th win if it hadn't already).
So, at 1% drop rate, we wouldn't expect to see a mirror until we'd beaten Levi EX 100 times.
Nice! A mirror drops!
Oh, there are other people...
Now we have a 1/8 chance of winning the lot!
So now we can assume that we'll get it now (lucky!) or... later. Even if it was guaranteed (it won't be), that means it would take between 100 and 800 wins in order to obtain a mirror.
The reality is that unlucky people will NEVER get a mirror. Ever. Unless they can force some people into slavery that are going to pass it to them when it drops, or go with a static where they take turns lotting, in which case maybe they'll get it by 800 wins.
Please contrast this with Turn 7 (Second Coil Turn 2). Sure, it's much more difficult, and you can only complete it once a week, but I imagine you will get the Unidentified Allagan Tomestone from Turn 7 waaay before you ever luck out and get a mirror.
What is the point of this? I could spend 10~ minutes or whatever it is beating Turn 7 each week, where I'll almost definitely get the UAT eventually if I'm in a static, or I could spend literally HUNDREDS of hours farming Levi EX and probably not getting anything? It's just a level 100 weapon, guys. If you want it to be so "rare", lock it behind a harder fight.
And why apply the same 1% drop rate to MOUNTS of all things? SE said there will be something special if you have all the primal horses... Who's the awful person who actually has all of them so far? I've done TONS of EX primals, and I only have 1... I've only even SEEN the mount drop once, EVER. Believe me when I say I'm not amused that I got Enbarr instead of a Mirror of the Whorl. Good game, SE. Good game.