I think to be honest they should have canned the Esk Valley route and kept the route from Saltburn to Scarborough, but we have got what we have got. An infrequent service running to a small town at the end of a sparsely populated area, on a line that the maintenance up keep per year must be very close to the actual fare receipts if not higher, and that is before the subject of unit and staff costs etc..
I did some work on the Esk Valley line a few years back, cant quite remember the location, but because of the access difficulties a relatively simple bit of work probably cost in excess of £100,000 and that is before any remedial works were done, that was just a ground investigation.
I think a lot of people dont care to admit the standard to which the lines were built and are now suffering quite a bit just through the normal usage and costs per year are only likely to go up and that is excluding any major infrastructure work.
You ask the question "When will something be done about the Whitby line?", you could counter the question with "A what point does TOO much need to be done about the Whitby line".
Dont get me wrong, i love travelling along the line, but the only time I considered getting the train to Whitby was when I lived in Thornaby. I live in Leeds now and would never think about getting the train to Whitby.