Fitting in quick London services to the prime regional cities (Sheffield, Nottingham, Derby, Leicester)...You’ll get plenty from me!
Fitting in quick London services to the prime regional cities (Derby, Nottingham, Sheffield), speeding up the slower Nottingham service, adding in extra services to Corby, providing decent connections between the Nottinghams and Corbys in both directions, flighting them all through fixed Thameslink paths south of Harpenden, and the other big constraint at Sheffield, plus shifting all the local / regional EMR services in the Derby / Nottingham area to fit..... that must have been quite a challenge.
For sure you can’t please everybody, but there will be many more net gains than net losses from this.
This is also a very good service for Leicester, fast peak trains to London in the early morning, later trains to London at night and faster trains from London at night and a good spread of departures and many earlier morning services to Sheffield and Nottingham.