Makes sense to me and i will do like you said. Even if there are only small changes ;-)

In this changeset i did only small edits. I connected dead-ends, added switches or restored the railway tagging after an incomplete revert (changeset/33890248 + 34193524). The small mistakes are found during routing tests all over the country. Thats why the bounding box covers most of it. I will try to describe the small changes a bit more in future. Or should i upload every single edit to specify the location a bit more?

Even though i didn't set the name of the lines, i changed the name between Chalfont & Latimer and Amersham to "Metropolitan Line". This name ist also set for the route to Chesham.