I can appreciate that the Quint/Heavy could be considered too powerful and that they can’t introduce every possible apparatus out there but I would argue that adding the a Truck company that has rescue equipment is the second or third most common apparatus in the US. And a platform/Heavy wouldn’t be any more powerful than the Rescue Engine is.
To help combat the quint/Heavy being to powerful they could make it so they only count as one of the required apparatus rather than satisfying multiple of the requirements like the Rescue Engine.
As for the Hazmat/Heavy I don’t expect it to happen. I am just voicing that it would be a good addition in my opinion.