" Summer - This is the normal State. (plains are plains ; desserts are desserts ; taiga stays taiga)
Autumn - In Autumn each Biome, excepted SnowBiomes, will changed to desssert. This is because of the textures of leaves and grass. In a dessset they are looking more like autumn.
Winter - Each Biome excepted the desserts will be changed to Ice-plains. So it's snowing everywhere. There are also some cool features in Winter.
Spring - Each Biome will be changed back to their normal State/Biometype. The fallen snow will be removed and ice will be replaced by water during those days. Please mind.
SpecialFeatures:
In Winter you have to wear leather armour to protect yourself from the cold. Helding a torch is also possible. (You won't get damaged in deserts)
Plants won't grow or will grow slower. (excepted in deserts) "
I don't like this. I think having regular biomes is better.