Reading was a complete remodelling plus new bridges/embankments/lines etc. It’s probably more comparable to the London Bridge remodelling under Thameslink.
£4m won’t get you a lot, but it might make it a bit of a better experience for the passengers, at least the ones who are leaving....
It cost £897m to fix Reading.
For £4m all they can do is burn the town down and skip the stop.