In at least the US version, we should have LESS fires and more calls. The ALS Fire Engine is annoying. Everyone knows that a real Fire Truck wouldn't transport. Here's what I think.
Engines and Platform Trucks should double as Fly Cars.
More calls like (CPR, Unknown Medical, etc.)
Maybe even fire alarm activations, Lift Assist, and the like. It's really hard when several major missions stack up, consuming every last resource.
If you take a second to google it instead of assuming you know all, you'll see it is realistic. I love that there are so many people on here who voice their interests and preferences for the game, as long as they don't disrespect the substantial effort put into the game by volunteer content advisors and the other quite reasonable and non-presumptuous suggestions of respectful members of the community.
As for your actual suggestions, they add new missions every Monday, and there's a great thread on the US Forum for suggesting missions, which will then usually be picked up by the content advisors and passed to the devs. It's worth remembering though that the USA is a very very large country, and there are bound to be huge differences at local, regional and state levels for how often types of calls take place, what the response procedures are, the apparatus used etc and the game simply cannot replicate those differences per player geographically, so there will always be certain calls, units and mechanics which aren't going to fit your area.
My opinion is that it's better to add more generalised and broad-reaching content first, and more specific content later down the line when most of the general stuff is covered, as this benefits the majority of players. I also think with units it's better to add new ones than change or remove existing ones, as this gives players more opportunity to create a fleet suited to them. Personally, I see no use for the ALS Engine in my setup as it currently exists, however I would definitely like to see an engine being able to act as a fly-car , perhaps with ALS trained staff as a requirement for it to do so?