Hypothetically, they could change the MDC car if they think the narrow 4 cars with 2 seats per row won't work.
Uncharted has 12 seats on a single car, and that seems to work out fine. Only real detractor from this is that this would make the replacement a "Net" neutral, assuming if the throughput is similar to Rockit, but it would allow them to have the controlled spinning from USH in place.
View attachment 24275