core 4 schedule

Considering Phi Psi is gone and Sig Chi and Alpha Delt can't take PCs, other frats will probably get better PCs and improve so c4 might mix with more frats

They mix with so few frats because that's the major way to differentiate themselves from the upper-mid strats. The past couple years the upper-mid strats have been a lot more social climby (in particular SDT & Pi Phi) and thus, have been mixing better. It's also a result of the core 4 social chairs...who's most likely to be the social chair? the girls most concerned with status. It's not like frat social where you're elected to plan logistics and stuff.

There's a decent amount of girls in the core 4 who wish they mixed with more frats, but the socials are scared of losing status. You don't think they get bored of seeing the same few guys out? (top frats are small in numbers generally).

Even with Sig Chi and AD not being able to take guys and Phi Psi being kicked off, I doubt their schedule will change at all.