Yes, they should be taken into account, and the reason I tried to simplify the seven classes of airspace into uncontrolled and controlled was to simplify the view of that.
I don't know if the four classes of drones or examples of classes of drones, UAVs, that your colleague provided are the accurate ones, but it sounds like a pretty good place to start. It's not necessarily official, but it comes down to the government supporting the work that's currently under way with Transport Canada on implementing regulation that is not too constraining for the lighter recreational use of drones in uncontrolled airspace versus all drones in controlled airspace that pose risk.
Eventually, as time goes on—and this will progress most likely at a fairly good pace—the implementation of commercial use near controlled airspace or how it would operate outside of controlled airspace, lower flight altitudes, and beyond line of sight.... There are the different types of drones we can think about seeing, or UAVs, then there is the operating within line of sight, and then there is the future of operating beyond line of sight. All of this becomes much more important in and around controlled airspace, and in particularly airports and close to airports.