And what will the study/ies show? Even if the FML is rehabbed to the point that 70 becomes the pax MAS and much double track gets restored, there are still 92+ miles between the old North Adams platform and Fitchburg, 92+ miles of heavily graded and curved ROW that will have a 30 MPH restriction for the Hoosac, restrictions between Greenfield and East Deerfield, restrictions at Gardner, restrictions either side of MP 341, restrictions east of MP 335, plus whatever other restrictions wisdom might impose.
With luck and no complications plus whatever minimal amount of local stops might get thrown in to convince state reps and senators of the benefits of the expenditures, there might be a highly optimistic consumption of 130 minutes.
The "express" trip east of Fitchburg would encounter restrictions through East Fitchburg, Ayer, South Acton, Concord, Lincoln, Waltham, Porter Square, and the approaches to North Station, 60 minutes being another highly optimistic consumption of time, still a total of more than 3 hours.
Like most other readers, I'd gladly indulge myself in at least a couple of roundtrips. Whether The Great and General Court would be so indulgent as to enable such self-indulgence is highly questionable.
"A gray crossover is not company transportation."