Mainline currently has 107 departures a day at PIT. If mainline only served PHL, CLT, Florida, West Coast, LGA, ORD, DCA and BOS (as we do today) we would be down to 70 mainline flights (give or take a few.) Now enters MidAtlantic, PSA and the other express carriers to serve cities like DFW, BNA, ALB, ROC, BUF, RIC, MHT, BWI, etc.
There is no way that PHL or CLT could handle flights to such cities as GRR, TOL, EVV, SBN, PKB, DUJ, JHW, BFD, ELM, ITH, etc. So there will still be a major presence here in PIT in order to maintain service to most of the cities on the route map. Totally pulling the wheels off of PIT would mean the elimination of service to many communities and I dont' think that is going to happen. So the numbers of 65+ mainline flights may not be off base, but only 38 express flights, IMO is way off base. Remeber, DCA is a focus city with over 200 flights a day.