Theres a bigger picture going on here. Suffolk downs is part of a larger shift overall of decentralization. Each neighborhood is building its own downtown, which is a part of a larger trend were seeing overall. Historically jobs have been centralized downtown, where everyday hundreds of thousands of people all commute to downtown from wherever theyre from, and then at the end of the day they all head home. These mass movements of people to and from the core cause massive gridlock, and jobs being in the core mean people have to live far away from where they work. Today were finally seeing a shift towards jobs being spread around between many different neighborhoods which will eventually allow people to live closer to where they work.
Each neighborhood is building its own downtown for people to work in. If you live in dorchester youll be able to get a job at bayside/jfk/harbor point. If you live in Somerville youll be able to work at Assembly/Union. If you live in Eastie theres going to be thousands of jobs at Suffolk downs. If you live in southie you have the seaport, but Broadway is getting build up too along with the south end close by, and Andrew/dot ave has a huge masterplan coming. East Cambridge-Northpoint, Cambridge-Kendall, Brighton-New Balance/Allston yards, Allston-Beacon yards, Watertown-Arsenal yards...etc.
This is a major shift, so its going to take a bit, but the idea is sound. Many people will be able to find jobs close by to where they live. Even if someone cant the people in/entering the work force today dont own homes and are not settled and very transient, so it wont be a big deal for the person who lives in an apartment in Brighton who gets a job at Suffolk downs to move somewhere in Eastie. Even if they dont want to move having New Balance, Allston yards, and Beacon yards being built close by will give them lots of opportunities to find work that they didnt have before.
Looking at each project in a vaccuum ignores the greater shift happening across the city. All of these different cores in each neighborhood will encourage walking/biking and transit because people will actually be able to live much closer to their work. Its not going to happen overnight, but the direction the city is moving is necessary and its going to change a lot of what we think about the live/work relationship.