I love online classes and so does my daughter. But online classes need to be more than just a remote version of the in-person version. For screenwriting I would think it would work wonderfully.
Online classes usually have required posts each week, with required responses (say, 3) to others’ posts. And there is a lot of discussion. Including the bright student who sits in the corner in class but is comfortable writing ideas. I would think there would be more honest feedback on writing, and more sharing.
There seems to be a lot of prejudice against online classes but the majority of adult college students rely on them.
Often the potential for media/audio visuals, links to interesting reading and class interaction can make them really good experiences.
As for LMU versus JHU/CTY, I have no idea.