Folks have won Nobel prizes for documenting the paradox of choice. So I won’t try to replicate their work- I am neither an economist, not have their capacity for number crunching.
BUT it seems to me that the suggestion to get on the T, go to South Station, take the Amtrak train to Providence, trudge up College Hill to hang out at Brown and feel the vibe, maybe get a sandwich (which is presumably the same sandwich one could eat at Tufts)… and then reverse the process to end up back in the dorm having invested an entire day in “checking out” Brown… that day could be put to more productive use RIGHT WHERE HE IS. Make an appointment with his advisor to express disappointment at the lack of challenge and have the advisor redo second semester courses. Reach out to one of the “no audition” a capella groups to see if they need a business manager who can’t sing (or if he can sing, even better). Write a one- page parody of something happening on campus and submit it as a feature piece to the student newspaper (no, you don’t have to be “on staff”. Publications accept guest-author work all the time). Go to the gym and sign up for golf lessons or swing dancing lessons, or just show up at a Zumba or yoga class.
The reason these scholars have won Nobel prizes in Behavioral Economics is that they have documented a phenomenon we ALL recognize in real life- but they’ve put actual numbers around it. Namely- it is MUCH easier to invest time, energy, money exploring “something else” than investing the same time, energy, money in exploring right where you are at this very moment. And that the more choices one has, the easier it is to NEVER choose-- whether to be perpetually in search of “the right one”, or to feel that one has settled for something less, or just to walk away without having to commit.
OP- there is NOTHING you have posted about your son that suggests that Tufts is a poor fit. I get encouraging him to seek out that which is missing… just make sure he isn’t investing so much energy in transferring, thinking about transferring, wanting to transfer, that he’s ignoring the opportunities in front of him.
I would also suggest to him that he reach out to transfer advisors before he falls into a rabbit hole. There are some schools being mentioned on this thread which accept very small numbers of transfers-- and I’d be shocked to learn that students with one semester of college grades who are accepted after applying TO did not fall into a “special” category, i.e. military veterans, Afghan/Ukrainian refugees, etc. I know Brown accepted several refugees in the last few years-- some with NO transcript at all-- but one should not assume that a kid with a “regular” HS experience who could have taken the SAT but chose not to (or did not submit) in any way falls into a “special” category.
OP’s kid sounds fantastic. It only takes one- one organization, one club, one activity or one lab partner who says “hey, let’s get coffee and review our notes before the next test” for things to turn around…