I feel like these trains should follow the tube model and have XX Mins to destination rather than the 17:10, 17:15 etc
In the central section these trains are going to be every 150 seconds - maybe even 120 seconds further down the line. Even minor delays will show everything thereafter as delayed?
They do in the Central section (the next train time is built into the platform screen doors). Outside of this it's run like a national rail service so shows the traditional times.