But surely it should be simple enough to look at what alterations have been made on other lines already and start off from a basis that is at least as good.
I would expect there to already be consultants doing similar to what you've suggested however the work is complex and many will be quite cut-off from the build process or only around in the short-term.
It sounds quite fatalistic what you've said, that we've basically reached maximum planning saturation so we can only pay the costs afterwards when things go wrong.
But surely questioning these assumptions is good for our civic involvement and for the lines.