Have fire spread more slowly when exposed to rain

It is great that Mojang is creating game rules for fire to spread quicker or more slowly based on the biome that the fire is in. I'm taking this time to ask Mojang, "please have fire spread more slowly when exposed to rain". Often, when I finally find one the more rare structures, such as the Woodland Mansion, it spaws right next to a lava pool. These rare structures are often a great deal destroyed, by the time I get to it. I've tried using the rain, to get to the lava pool in time, but that doesn't seem to work.