Bats split into 2 vampires. They might drop pelts, but that is not the same thing as familiars. Familiars use the DoN drakeling model. Familiars do not split on death.
The leather drops have been the hardest to get since they introduced the whole global TS drops by level thing. Nothing new here. It's where they wanted it.
They are not all that rare. Drop rate is about the same as diamonds or ore, if you are killing appropriate mobs. People see it as different because there are a lot more diamond/or/etc droppers than there are pelt droppers in the commonly used areas. But the drop rate seems about the same as far as I can tell.
Please do not adjust the drop rate of the pelt. This expansion is easy enough as it is. Make SOMETHING difficult to acquire. (T3 group armor and T2 raid armor)
The problem with pelts is mobs that should drop them are not. Kodak’s in gd Dire wolfs in Kael do drop them but rare as all hell. Dogs in velks not dropping them Ect....
How do "You" determine Who should drop what in a fantasy game.... It is easy to assume what should drop from whom in a fantasy game, I will give you that.
Normally people determine what things drop from what from past experience in the long history of EQ. Pelts drop from animals. And yes, even undead animals.
Because a developer told us in beta they would drop off animals. And the drop off some animals in some zones but those same animals in others they do not
What zone has same animals that "should" drop them and in what zone do the not drop in? I was not aware.