Vendors: Forest Hills is a busy station for bus-to-bus transfers (all the people headed from Roslindale, West Roxbury, and Hyde Park to the Longwood hospitals and schools and to Boylston St. will keep taking an outer bus to the 39 bus and changing at FH), and it will become a busy station for CR, too, so business shouldn't fall off too much for the vendors.
Well, except for this measure that may reduce passenger traffic through FH somewhat, but which is also good news for smooth movement of CR trains and passengers:
They said Charlie Cards would be accepted out to zone 2. That means that people who usually take a bus to FH from Roslindale and West Roxbury can just get to the Needham Line at their nearest station, and that people who usually take a bus from around Cleary Square can catch a train from there (Hyde Park or Fairmount Station). This should help make up for the fact that CR cars take longer to load because they have fewer doors. Hopefully the T will come up with somewhat longer trains for those lines. Are there any compatible cars they could lease short-term? Maybe Amtrak could lease them a whole train or two worth of Amfleets or Horizons, now that some of the Siemens cars are in service?
Afterthought: I am picturing the shuttle-bus options along the Southwest Corridor. I wonder if they will just try to stop at all the stations -- which would lead to a slow, serpentine route on residential streets -- or if they will also/instead bump up service on the 39 (Forest Hills to Copley Sq via Centre St and Huntington Ave) and the 42 (FH to Nubian via Washington St) and then run a line of shuttles from down Washington St. and Columbus Ave, skipping Green St and Stony Brook (which are close to the 39) and getting to Jackson Square a lot faster; from Jackson Square, Tremont Street and Columbus Ave allow a pretty straight shot downtown. I wonder if they will do anything with the E line: it might make sense to have some extra 39 buses that only go in as far as Heath St, where passengers can transfer to the E to get downtown, instead of having to take the 39's roundabout route to Copley.
I suspect a certain number of the employees can be put to good use directing pedestrian traffic at the shuttle stations. Some others COULD be used to create and staff temporary prepayment zones at major shuttle and CR stations (eg check or collect fares before people go down to the CR platform at FH, or before people board shuttle buses at FH, Jackson Squ, etc.