Are any LNER calls there currently (or recently have been) pick-up / set-down only? The only LNER examples I can think of are some very late-night ones north of York.
Stevenage’s current first LNER southbound on weekdays is 1B81 ex Lincoln to King’s Cross at 08:58. As was said likely to avoid issues into King’s Cross in the busy morning peak. There’s not really a lot of room for error most of the time, least of all at that time of day.
The only Anglo-Scot’s to stop at Stevenage on weekdays is one northbound right at the start of the day (1S04) and 6 southbound at the end of the day - 1E22, 1E23, 1E24, 1E25, 1E27 and 1E29, the last of which is set down only due to it being after 00:00. There is 1 Newcastle northbound at the end of the day on top of that - 1N34 (21:00 ex King’s Cross).
I’m not aware of any pick up only’s at Stevenage, but as I say 1E29 southbound on weekdays is set down only due to its post midnight time.
1N36 and 1D36 are both set down only all the way, but neither stop at Stevenage. 1N35 is set down only after York.
So if you compare that to the new timetable hopefully that will give you an idea of what’s changed.