Well, I don't want to get too far on this [off-]topic, but there's a lot of room to grow between current SL-Waterfront and "bursting at the seams" (which may describe SL-Washington). Together, the SL1 and SL2 ridership combined approximate an above average bus route (but less than the 1,23,28,39,57,66,111 key routes). But they are advertised as "rapid transit." The cost of building the system was $624 million, and the Courthouse station alone was $110 million. Simply ridiculous. And a lot of people won't use it because it's inconvenient; requiring at least two transfers. And it's competing with two massive superhighways and loads of parking lots.
As for the RKG, it IS the surrounding neighborhoods which make me worry. The Financial District is legendary for its deadness. The planners of the CA/T stipulated that "75%" of the RKG must be "Green Space." That's a pretty arbitrary number, and ties everyone's hands. As a result, we get "Green Space" in the form of landscaped tunnel ramps and leftover bits of grass between curbs. Then there's the whole issue of the "Conservancy" and their continuing rip off of the public.
I appreciate your critique of the Silver Line; my problems stem mainly from it's inability to handle Seaport ridership projected as the Seaport evolves and there's no substantive dialog to address that.
As for the Financial District, I suppose one could ask whether an office district should be expected to be anything other than a ghost town outside of 9-5, M-F. That doesn't necessarily mean it's failing. Isn't Lower Manhattan (e.g. Wall Street) dead on weekends?
My view of the Greenway is that when the Seaport is fully built, it will offer an incredible walking experience from the waterfront to the North End. The water's edge parallel to Atlantic Ave (Rowes Wharf and beyond), has been subject to intense commercialization (i.e. limited public uses) and does not have nearly the potential as RKG as a pedestrian thoroughfare.
As for the ramps, during a walk through the Greenway I see them as expected bits of urban fabric. I like walking along the ramps, looking down into the tunnels, etc. I don't see a problem with that.
Lastly, not to defend the Conservancy, but no fraud has been exposed. The Conservancy may deserve ire due to a lack of transparency, but if we want a world-class public realm (think Millenium Park) we need a City committed to invest in it. I think Boston (and particularly the Herald) has an odd tendency to find a consultant paid $100k and tear that apart. Maybe Brennan doesn't deserve $250k? Fine, but IMO the Conservancy has been torn apart over petty issues. Millenium Park cost $475m of which the public paid $270m.