My only question would be in regards to the MFA, which is significantly less reliant on "family" traffic. However, without signifigant E Line upgrades it also has worse transit access than the others
We un-schooled 4 kids--which in Boston means lots of awesome trips (ranging from Sturbridge Village to "Plimoth" to
Merrimack) and teaching them to take all transit (the
MBTA makes it easy for homeschoolers to get student T passes, too). The E Line is simply too far from connecting to where families live in the metro area. I'd wager that the E has the most-skewed "no kid" catchment of any transit line. (GLX will partly solve this)
I hate to say this, but I wondered how much of the "kids don't go to the MFA" is "art is boring" vs bad parking. Neither is a reason to be proud of, but it seemed to me to be a self-reinforcing spiral: kids don't go to the MFA because... garage-beyond-surface-lot isn't good for exhausted kids... because the MFA is not expecting kids to come...
My (tweens) kids can take the 80 to MOS (or, really, to the Cambridgeside Mall), and we know lots of families in Somerville that take the 87/80/etc to MOS, but, even so, once a parent decides to go too, the car wins.
MOS will clearly gain from GLX...now instead of "mostly-just-the-E" you'll get both D&E and real North Station connections will be possible. But I'm an outlier. Most families live far from the MOS's transit, and so back to the garage they go...