The Lackawanna Cutoff project to Scranton would probably be considered a "beating a dead horse topic." I believe that the right of way between E. Stroudsburg and Scranton goes up mountains and that combined with the several curves would hinder travel times between Scranton and E. Stroudsburg.
The towns in Northeastern Pennsylvania are very spread out and the Martz and Greyhound Bus stations aren't in downtown areas. Many of the Martz buses stop in Delaware Water Gap, located a few miles outside of the Stroudsburgs. Even the buses that stop in Stroudsburg stop at park n ride lots closer to the highways like I-80. The Mt. Pocono Greyhound and Martz Station is in one bus station and it's located probably several hundred feet from where the Pocono Main right of way is. In fact, I think the Mt. Pocono Lackawanna Station building is along 611 next to the bus station. To be honest, many of the former train stations along the Pocono Main-I don't think they are very close to downtown areas. The line does pass through Tobyhanna and it looks like it's straight through there. It looks like the between Henryville and Mt. Pocono, the route takes indirect turns. Looking at googlemaps, I see that there is a 180 degree curve in Cresco and then a few miles to the west closer to Mt. Pocono, there is another 180 degree curve. From Mt. Pocono to Elmhurst, the right of way on a map appears to go a little more direct. After you go under 84, the 180 degree curves return. 180 degree curves and mainline passenger rail routes do not mix.
FYI, the fastest NYP-Dover train is weekday westbound 6641 which does the trip to Dover from NYP in an hour and twelve minutes. It doesn't stop at Secaucus Junction and after NWK Broad Street Station, it runs express to Summit. That's not bad for an M&E express train heading to Dover but NJT running only nonstop to Summit from NWK trains with the ultimate destinations of E. Stroudsburg or Scranton isn't going to cut it. The train will still take longer than driving on 80. When the Phoebe Snow ran on the M&E, that train made only the following stops-Brick Church, Summit, and Dover. That is a true super express on the M&E. Today, any express train should never skip Morristown as that station has several employers nearby and probably many of those people live well west of their, including in Northeastern Pennsylvania.