Would be kinda cool to see something like Decon units and more SOC stuff in the game. Seems like the only SOC stuff is the one hazmat unit and water rescue.
Maybe something similar to FDNY where some ladder companies (Ex. Tower Ladder 14, Ladder 47, etc) are SOC support companies and some (Ex. Tower Ladder 12, H&L 6, etc) are chemical protective clothing (CPC) ladder companies and respond to hazmat calls. Some of the engines too are decon engines and run with light decon equipment and go to hazmat calls as the decon teams.
Having a more expansive hazmat/SOC side of the game would be cool. Maybe specialized hazmat teams for certain missions or distinctions between capabilities? (Similar to how we have large, medium, and small ARFF units)