Change Fenway Park whatever happens; it is confusing. And even though it is near the beginning of The Fennway, it is off to one side and is not really the best way to get to The Fenns or attractions on the Fenns (Gardner Museum, MFA, rose garden, Victory Gardens, Fire Alarm HQ, whatever.
How about Muddy River? True, Longwood is also on the Muddy River, but no other station has such a strong connection to the Muddy River. Except when the river comes into the station.
, And it would be a nice place to start a walk along the river. Or get the big thing that used to be the Sears building to pay to put its own name on its local station, and maybe attract more pax that way.
As for the commuter rail station by the ballpark, almost anything would be better than Yawkey Station from a purely wayfinding perspective. Yawkey only made intuitive sense to people who knew who used to own the Red Sox. That was never most people, especially most people trying to navigate Boston for the first time. By now it's almost as if there were a station out on the D line called "Near Where Grossman's Used to Be."
And now the station isn't just a special stop for Sox games; we'd like people to use it who are just going in and out of that neighborhood.
Jersey St. puts it on the map AND into the Back Bay alphabet of streets.
Kennmore wouldn't be any worse than the two North Stations or the two South Stations, and ties it to a landmark.
Fennway Park would lead very, very few people astray; just a few T experts would be confused if they missed the memo. And those people, like us, look at the map a lot even if they don't need it.