Wondering about Hungarian air force procedures - do they actually have 24/7 coverage ? Given the size of the country and timing involved it would not be completely trivial to pull out this intercept.
Hungary is policing the airspace of Slovenia as well (as the latter does not have military jets). Ref. the lost comm: might be useful to have the phone number of your OCC accessible for ATC units. With a quick phone call and an ACARS message the scramble can be spared most of the times. Introduction of CPDLC will also decrease the risk.