If we lived in a perfect world the Port Authority would allocate some 15/20 billion to totally re do the midtown PATH lines.

They should re-align the tunnels so that it’s a straight shot between Hoboken and Christopher, allowing for 40mph speed for the entire journey, this would cut down travel time so it’s comparable to EXPL-WTC. This would allow trains to run NWPT-HBK-CHRS-Midtown in less time than it takes to get from Newport to Christopher currently. Added bonus of making the HOB-33 dedicated route redundant which eliminates the merge at the Newport junction and reduces train traffic. You could either leave Hob-Wtc the same or just run WTC-33rd depending on whichever has better terminal capacity.

The narrow tubes and curves at Christopher street are a big service bottleneck. The fact that trains must slow to what is essentially a walking pace before entering Christopher really screws up the train traffic situation.