Regarding the much-delayed Lackawanna Cutoff project:
The rails from Scranton to the Delaware Water Gap are operational for freight, and are now controlled by a single "Pennsylvania Northeast Regional Railroad Authority" managed by the counties. They don't have much funding for upgrades, but on the other hand, upgrades aren't very useful until the New Jersey segment is finished.

Scranton has a functional station (at Steamtown) with a wheelchair lift, and the Authority runs tourist trains from there to the Delaware Rail Gap occasionally. The Authority was set up to provide the management for Pennsylvania funding of Scranton-Hoboken trains, and can presumably do so once it is possible to run trains all the way.
Basically, the main problem is one of getting the structures and track rehabilitated in New Jersey and across the river. At that point one could actually start running trains to Scranton immediately; the relatively limited funding needed for further trackwork and further stations in Pennsylvania would probably show up at that point.
NJT is currently building the fully-funded, earmarked extension to Andover, but it has been delayed for *years* due to weird issues, including the designation of areas which flooded post-1983 as "wetlands", discovery of endangered species living near the line, problems with rehabilitating the Roseville Tunnel, and diversion of trackwork personnel to other parts of NJT due to Sandy etc.
If the Andover service ever gets started, that will have dealt with some of the most obnoxious pieces of rehabilitation; Andover to the Delaware Water Gap is unlikely to have the same sort of problems. There are at least two huge concrete viaducts from Andover to Pennsylvania which will constitute the bulk of the remaining work.
Binghamton-Scranton is only a dream at this point, but would run entirely on existing, well-maintained rails, currently owned by CP (though there's talk of CP selling them to NS). There's plenty of room for a platform in Binghamton. At that point, Binghamton-Cortland-Syracuse could run on the lightly-used NYS&W line... Cortland station still exists, and there are multiple stations in Syracuse left over from OnTrack, connecting finally to the Syracuse Amtrak station. Senator Schumer has proposed running the full route Hoboken-Scranton-Binghamton-Syracuse.
Unfortunately all of this only makes sense if the route in New Jersey can be rebuilt, and NJT has been dragging its feet for whatever reason.