I realize it gets crowded in there, but I think this is a stupid deal for MBTA. The undeveloped property is fantastically valuable, even with the easement, and it can't be long before it gets developed. And when that's done, you'd have gotten a proper headhouse without shortening the tracks. Now, you shorten the tracks (bad), and get a bigger surface-area headhouse (good), BUT:
- You have to stick with the ceiling you've got, which means fairly low overhead. No high open welcoming spaces like South Station. It'll have all the ambience of an old bus terminal - and much less than South Station's new bus terminal.
- No enclosed connection to the subway, and probably you'll never get one.
- No direct connection to the street. The best you can hope for is that the new development would be a shopping arcade of some kind, that commuters can walk through. But in any event, the station will be hidden, buried, and lost from sight to people who don't already know it's there. Bad for advertising.
- No hope for the future. Build a new building without a new headhouse, and you'll have to wait 50 years to get another chance to do it right.
But that's the MBTA for you - absolutely no thoughts for the future, only for immediate convenience and cost savings. The owners of the facility must be laughing their way all the way to the bank - for a few million of concrete and tile, they get free title to hugely valuable prime ground-level retail space when they build.