As much as I'm glad this clarified the purpose of overheating, it doesn't look like it will do anything to fix the monotony that is the 50 seconds between Wildfires. Heat will still build so slowly that you'll only be able to use Cooldown once between Wildfires. This at least gives a skilled MCH something to optimize, but I want a job that's interesting most of the time instead of 1/6 of it.