You certainly may have more info than I. My summary of what I saw was simply a street level view I had while visiting. The Berkleee bookstore is gone from Mass Ave, relocated into a much smaller footprint on Boylston. The content of the bookstore is 95% NEC swag. There are a few Real Books on the shelf; but, the excellent Garisson Fewell Jazz Improv texts etc were nowhere to be seen - though I will admit some of that may have moved online. There simply was negligible Berklee content, primarily NEC.Unless something has changed very recently -- like, in the past ~6 months -- that too is completely incorrect. I'm still looped in to both Berklee's and NEC's alumni associations, and I've never seen anything suggesting an alliance between those two institutions...and everything I read from Berklee's alumni magazine and promo materials suggests that it's even more heavily oriented towards commercial/popular music, jazz too to a lesser extent, and just a token involvement in classical [sic] music.
Berklee did recently (meaning in the last ~5+ years?) take over administration of The Boston Conservatory, a much smaller school than NEC, perhaps that's what you're thinking of? But as I understand it there's been very little cross-pollination between the two schools; the arrangement simply allows the Boston Conservatory to remain solvent, while allowing their students to "broaden their horizons" by taking some courses at Berklee.
I saw Zero guitars being schlepped, and only a single apparently orchestral bass along Boylston. As I said, Zero Wurlitzer or Daddy’s Junky or anything even distantly related. There simply was no Pop Music presence. On the streets.
You may be entirely correct that classroom instruction continues. You just wouldn't know it from the street.