They should have shut Midland station and focused all the services at Victoria. It was electrified and not as great a bottleneck as trying to get north out of Midland.
There's been plenty of opportunity to fix Midland - just not the priority to do so.
@GardenRail would tell you half a dozen fairly simple signalling interventions (today I got the usual 3 mins to examine the stonework of the cuttting north of Midland, again).
The only routes not served by Victoria would be the Hope Valley (a backwater) and the route through to Barnsley. Victoria could easily have served everything else.
The _current_ route to Barnsley would've have been a different route had Victoria prevailed. Into the mid-80s there was a line up to Chapeltown (at that point, to a coking works) from the Woodburn J - Rotherham line. It was within yards of the current Barnsley line (the supertram takes its route under Tinsley viaduct) - but there were also other lines (railmaponline.com is a gem for this).
Midland is at least on a NE-SW/London axis - whereas Victoria would've been a reversal for today's York-Birmingham services, and reversals would never succeed due to unpopularity on railforums.co.uk (and back in the day would've involved a loco change or run round).. although they could've run York-Leeds-Huddersfield-Penistone come to think of it..
Instead we're stuck with a diesel only station, in a constricted cutting to the north. A cement train derailment showed all too well how poor Midland's northern escape is. Then there's a meandering route to Manchester lined with long Victorian tunnels. Basically, a second rate railway system.
.. or how neglected..
I don't think Sheffield will ever be electrified in my lifetime.
I hope you're not the youngest contributor to this forum! I'd wager its within about 15 years,.