i dont think they go to milton now (which is a big shame). Because they only now cut back into Watford Junction. The crowded sections really only is between the overground stations to Selhurt or something? I cant remember but during peak its PACKED.
Its actually between shepherds bush and watford. Its PACKED because they use 5 cars only. Which is silly. And then the trackwork between these two stations is for the most part....20 fricking miles per hour for like 3 to 4 miles its crazy that no speed improvements have been made in that section
Id say it should be improved to a minimum 35mph but average out at 50mph to 60mph as a part of some inprovement scheme for that section. Because damn is it sooo long.
But seriously , more services or routes like towards tring or bletchly terminus platforms should be considered for southern, And even then, a re route or additional service from east croydon or london bridge to watford jnc and beyond etc via tulse hill too (theres a section of track that leads to clapham jnc after tulse hill, that gets disused for some reason) this will prevent people who live near london bridge or dulwich , from having to keep changing over trains. Just one train in a loop from londom bridge, plus the east croydon service towards watford. So it adds capacity. And prevents serviced from being bombarded at least.
Another way to reduce packed services is to have a 377/2 pair with a class 377/7. 9 cars, more capacity. Or straight up 10 cars.
But this is just a hypothetical but i think it would be a cool endevour