It's not, though, when they are using 3 tracks on the Main Line during rush hours. That's why they need another overpass (marked tracks C, D on my sketch) over the VWE.

Can’t get the files open on the ferry but I’ll look later

IMO: Off the track map, one solution to this might be to have the diesels dwell on Track 7 and then send the electrics to 6 and 8, both of which provide a cross-platform transfer opportunity.