Most of the time when delving into Clockworks with a weapon thats completely heated, you pickup a lot of unnecessary heat your party members could be using. So what if you weren't able to pick up heat unless you had a weapon to be heated? That way your party could get lots of heat that you would've had wasted.
Comments or suggestions, anyone?
ERROR.
Heat, like crowns, is shared among the party. No matter who picks it, everyone gets it.