I agree with you on most of that, and of course Leeds/Edinburgh would skew the stats, but that doesn't actually make your comparison any more valid statistically speaking.Yes in an ideal world I would have the usage stats for just the IC services, but it isn't, and Leeds has a disproportionate usage compared to all of the other stations.
Yes Derby and Sheffield have connecting services, but so does Leicester, Peterborough and Doncaster!
But my point is that, Leeds has a much denser network of lines, which makes it much more difficult to determine usage of LNER services.
Same with Edinburgh, which has lots of Scotrail services, and the train has a much smaller modal share to London than all the other cities, which makes the usage stats useless in this case.
All I'm saying is that the usage figures gives us a rough idea about the usage of both the ECML and MML for intercity travel, and that the MML is relatively close to the ECML figures, even though one is the premier route, and the other is considered a 'rural backwater' in comparison.
However the usage figures show that apart from Leeds and Edinburgh, the MML is just as important as the ECML in the places it serves, arguably the MML should be higher as Nottingham, Leicester, Derby etc have a much higher population than Peterborough, Doncaster etc.
If you read the EMT franchise thread it's clear that some people think that the, MML isn't a 'proper intercity' route. It should be a thought as a major intercity line just like the ECML, WCML, GWML etc, and therefore it should get the same level of investment as the other lines, such as proper length trains, electrification, proper Sunday timetables etc.
What the MML really needs is a) some proper bi-modes capable of 125 on both diesel and electric and b) more priority between Bedford and London. None of the other mainlines have to yield to endless suburban services in anything like the way EMT do...no wonder people are getting fed up with them!