This would make a good band-aid fix to the problem. Some airports are just not built for the traffic flow of IF, airports with a single runway, backtaxi and or lack of open ramp space. While reserving gates for arrivals would be a possibility for dealing with extreme peak traffic, it only delays the problem, as there will be horde of players waiting on the spawn map for the second someone despawns, to take their place.
Personally, a constantly rolling release-time system, based on projected traffic at the time of arrival seems like it would be a more efficient system, because instead of increasing the chaos level, it would give everyone a better picture of the traffic levels at your ETA. However that is the topic for another post.
While I can’t see myself freeing up a vote for this, I would support this addition as a short term fix, along with ATC schedules that chose airports appropriately sized for expert server traffic, (ie: less SXM)