The south side alignment would need an EA change and either there needs of a grade separated walkway plus elevator(s) to access each platform OR a traffic signal for pedestrian to cross the tracks.
One elevator is needed if they enter with a central platform.
If they really want to improve this intersection, they just need to excavate a tunnel under the intersection for left turning traffic.
View attachment 650357
They just need a tunnel shown in orange with a traffic signal at the south end either allow both direction. Regular traffic movement would stay on the surface shown in green. Block of track access shown in red. Finally a pedestrian bridge should be built in purple with 2 elevators/stairs to access the platforms. The tracks stay where they are.