Not having Legion yet and being glad that I no longer need a specific breed of Death Adder Hatchling, I decided to visit Timeless Isle.
Surprisingly, I noticed three or four Imperial Pythons, two Gu'chi spawns and two Zhu-Gon spawns in 1,5h. No pets so far, but got a fluffy Yak!
I'm surprised by that, and I have a question: Is it possible that the NPC spawns are buffed? Though some sources say that this rate should have been expected, before then, I used to camp several hours (also killing and skinning key creatures) with almost nothing.
I didn't notice any excessive farming (even at frog enclave), there were maybe 6 people max scattered across various parts.