Surprise, surprise. Of course it would make more sense to regulate it according to number of Delta Connection flights...
Is Alitalia also the owner of FCO TWR?
theoretically it should be regulated in terms of "first arrived first served" not get Alitalia away then everybody can hold while favouring 16R landings.
ADR (aeroporti di Roma), Alitalia, Maccarese SPA, Gemina SPA have all a common denominator: Benetton. In the real European world this is called conflict of interests and should not permitted as it is illegal
Once the line of departing is sorted there is a tendency to favour more landings on 16R
I would have no problem if it was a professional and indiscriminate planned system instead of the standard taking care of the locals.
This kind of culture, on my personal experience, is standard and unique to some Rome (FCO) old school air traffic controllers who still are convinced that Alitalia is paying their salary. It would be nice if they got a taste of what happened a few years ago in MXP.