I have no idea! See how it goes. Closed lines aren't actually going to be the particularly time-consuming bit around Newcastle: there are countless waggonways and mineral lines, but I generally don't show them anyway because this is ultimately a passenger railway map. It's more the Metro that will be the faff - fiddly to weave it in and out of the other lines in such a dense area.
I thought the Newcastle area wasn’t particularly dense with operational lines but is dense with closed. There’s no real rush to sort out the north east because it will need updating for the reopening of the Newcastle, Ashington, Blyth and Tyne line in a few years. Similarly with the area around East - West Rail. It’s not known exactly how it will end up.
The update couldn’t have come at a better time. I’m glad to see the Halton Curve and Exeter - Okehampton shown open to passengers with Sampford Courtenay closed, as well as new stations such as Kenilworth, Bow Street and even Soham, however I do have some very small corrections. The Olive Mount Chord between Edge Lane and Wavertree Technology Park is shown as closed when in fact it reopened to goods in 2008 and is quite heavily used to avoid reversals at Edge Hill and the avoiding curve at Southport is shown open to goods when the trackbed has been sold off and is now used to park old BMWs. Parallel to it is an electrified siding, but this was always a distinct siding when the curve itself was still extant and was not simply formed by severing the curve. Other than this I find everything to be generally correct.
What are your hundreds of other maps? I may find some of them interesting.