No objections to the idea... but given the scope of play (days or at most weeks), would it be 'realistic'?
Not sure why it wouldn't be. There has been at least one case of a person becoming an "ace-in-a-day" since WW2 [Muhammed Mahmood Alam, in the 1965 Indo-Pakistani War, famous for (according to the PAF) downing 5 IAF Hawker Hunters in 1 minute]. Israeli pilots in particular raked up impressive kill totals in Operations including Focus and Mole Cricket 19. Considering there are several CMANO scenarios that I can name off the top of my head [the majority of Fury scenarios, Don of a New Era, Spratly Spat, Yankee Team, several of the Shifting Sands DLCs etc] that involves high intensity air combat that makes it entirely possible for "pilots" to get ace-in-a-day status I'd say that this idea is hardly "unrealistic", if quite superficial as far as suggestions go.
SakiNoE