Yes, the countryside is quite boring. That's because it's a city generator, not a general map generator which places a city in the center :) . So anything that concerns things inside the city has a higher priority for me than anything outside... And there are just too many things inside that need to be improved/fixed/implemented.
Also, as much as I want to generate good looking maps, drawing (not generating) is a bottleneck right now - it takes like 100ms to generate a large city and 1000ms to draw it (approximately). Obviously adding gradients would make things worse performance-wise. I hope to fix it somehow, but for now...