I have a few suggestions from my observations in a day in the life of a Medic in MCNR.
1. Medic Helicopters should spawn close by to where the medic is located.
(I respect why aircraft do not spawn close by as it is a cheap method of escape, but Medics should be the only exception as they need to reach patients with haste)
2. While alone and driving sometimes typing /customers is cumbersome. Medics while driving should be able to press 2 for ease of access.
(would be even better if you press 2 and if their is no customers it automatically uses /findheal)
3. Medic's shouldn't be able to heal most wanted players in the vicinity of police.
( Medics will not respond to an active crime scene in real life)
4. If a medic rides with another medic they will target each other with Services
( When a medic toggles Heal it shouldn't target other Medics period, it should ignore they exist. Or maybe a medic driver with a medic passenger, The driver should at least not be able to toggle a heal target at all )
5. Medic helicopter colors should reflect the Class, i suggest 144 , 1 or vise versa.

