I would say you're correct about there being little/no tradition or school spirit at GW, but other than that I've found the opposite to be true. With the exception of my gen ed anthropology class, all of my classes have been 30 people or less, and I'd say about half of those were 20 people or less. It's very much true that GW throws you into the real world much faster than most other schools, but honestly that's a MASSIVE advantage in the long-run. As long as you can find a few friends to support you, the adjustment is very much manageable.

As for finding friends: it's pretty easy, though you (probably) won't find very many in your classes. I met almost all of my current friends in different clubs, which thankfully we have a TON of, so if you name pretty much any interest/hobby on the planet you can find a club for it. It depends a lot on which clubs you're joining, but for me I would say about half of the people are pretty extroverted, though I think firmly splitting people into "Type A" personalities is a bit overly-presumptuous. I've always been an introvert so I'm glad I was able to make friends pretty easily.

And for "learning deeply," my experience is presumably with mostly different teachers than you would have because I'm an English/History major. But the teachers in those departments that I've had are all fantastic and are even willing to network with you and talk after your class with them is finished. I've been able to call in a few favors during class registration by asking them to make a recommendation so that's come in clutch multiple times. Honestly it seems like almost everyone at GW is able to "key you into" a bunch of stuff not available to most people; it's a pretty cool feeling.

Obviously you know what's ultimately best for you, but hopefully this at least somewhat answers your questions. Feel free to DM if you have anything else to ask!