So I've noticed all though there's a few vehicles in the game for FD, there isn't much for EMS (or police). There's one Ambulance type.
What if there was also an EMS Supervisor, a car that can attend generally more serious incidents to supervise the EMS.
As well as Fly Cars that you often see EMS using such as Hatzolah or Empress EMS, that get there much quicker.
Here's a video of an FDNY EMS Supervisor:
And an Empress EMS fly car with a supervisor car:
And how about Rescue Medics? Medics who go to fires, hazmats and such that could involve people who need rescuing and medical attention, as seen here again with the FDNY:
It'd add more variety to the missions which I think people would really like!