Thread drift on my part - I was mentioning, as an aside, that our ADSB ground station coverage is poor.The OP is talking about flight schools making radio calls without including aircraft type, presumably causing ambiguity in other pilots' situational awareness. ADSB can mitigate that issue. Are flight school aircraft flying without ADSB out?
In your area, are planes without ADSB out making calls that don't include the aircraft type? If not, then you don't have the "problem" the OP has.