Being a SF/F person, most of my experience is through the genre fiction-lens which I'm not sure is what you write or not. Like amerigina, I'm doing an MFA at a low residency genre-friendly program (Stonecoast's Popular Fiction) and have a BA in creative writing (true, the school was more genre-tolerant than most). The BA taught me to write a lot, write fast, and hit my deadlines. The MFA is far more relaxed and receptive to what I'm doing that the BA was. It's teaching me more of the business side to writing (the networking and the talking and the contacts and the meeting people) than necessarily the craft, but there's craft elements in there too (workshops, seminars, and so on). It's a fairly balanced program, but it does have an academic slant to it. There's a 7,000-8,000 word research paper/academic project in the program's third semester, plus your graduating thesis (about 40,000-ish words of prose?).
While I think that much of it could be learned on your own without the formal education, I also think MFAs, workshops, and writing programs can fast-track a writer's development a bit. Because you're producing a lot of work in a short period of time with the structure of deadlines and expectations, plus the potential feedback from other writers and/or the instructor, I've noticed people tend to leap and bound through skill development (at least, early on; the more you do it, though, the fewer Eureka! moments you have, imo). BUT its expensive and definitely not for everyone. The MFA structure works for the now-me. Past-me struggled with the BA a lot. I'm grateful for it being there, I wouldn't be the writer I am today without it, I learned a great deal, and I made contacts and connections with awesome people, but at the same time, it was horribly stressful.
Stonecoast, much less stressful though less accessible, seeing that it's in Maine and I live in Illinois. Most of my schooling happens online in the six month semesters between the residencies (which are ten-day intensive workshops; if you've ever been to a convention, it's like the longest convention ever but with a lot less free time). The residencies are very regimented and scheduled, whereas the six months between are spent working one-on-one with a mentor (usually remotely). The faculty are active, practicing, publishing writers and the program's goal is (primarily) to prepare students for writing careers, and they're getting pretty good at presenting different routes and forms of publication as viable.
Just as a note, simply applying for MFAs can be expensive. Colleges and universities usually ask for an application fee (I think mine was $50). If my current life-situation didn't support my pursing this, I don't think I'd be able to do it.
I've never done the Gotham Writer's Workshop, but I can second (third?) watching Brandon Sanderson's lectures and the Writing Excuses podcast is great. For in-person, genre-friendly workshops, there's Clarion, Clarion West, Odyssey, and Viable Paradise as the big ones, but a lot of conventions and conferences have a writing track. Online, maybe Litreactor? I've never taken a class through them but they seem fairly average in price for online writing workshops, and they seem fairly widespread when it comes to genre and category offerings. Oh! And Odyssey has online courses available, in addition to the workshop.