Almost certainly, if they use it at all. I feel it's a domain that could have been quite interesting if they ever bothered to really expand upon it. And maybe if they toned down slightly on the enforced starvation, which doesn't make sense. Eventually, you'd have a populace that couldn't actually do anything at all, including growing the crops that Zhakata demands. There are plenty of other things that can be sacrificed instead of just food.
There was a module that expanded on it (circle of darkness), but honestly I found the stuff I came up with on my own fit my campaigns better than the module material. I quite like G'henna though as it appeared in the core book. I always read the starvation thing as it was extremely common, and most people were hungry, but actual death was rarer. Humans can definitely live on the edge of starvation. There are places all over the world where food scarcity is a real thing. This is a food scarce location the only difference is, instead of being a pure product of environment it is a product of the twisted religious delusions of Yagno. I always found that a pretty cool concept. I think even more though, i really felt the core started to just look like Europe after they took domains like G'henna away and made them islands. G'henna was at least something a bit different from the surrounding domains. Broke up the flavor nicely I thought