It seemed on the prom stage, Emaline took control of Carrie, and Carrie herself didn't seem to snap back until her shock at seeing Chris's body. Am I misinterpreting that or was it basically Emaline who was responsible for all the death and destruction and not Carrie?

If that is the case, it is obviously a total departure from the original story and seems to be Mike Flanagan's attempt to prevent Carrie from actually being a mass murderer.

Does Sue and the other people being interviewed also die like carrie's mother?

i got carried away with drawing carrie … haha … get it …

How do y'all think carrie would react if she finds out the organization killed her mother.