The one big thing I noticed that was missing from TSW2 thats in TS is the ability to create custom consists and use them on a custom scenario. Another thing is the ability to a "Quick Drive" where you choose either a default consist or your own custom one and drive it from one selected point to another without the need of creating a whole custom scenario.
Yes I want to put the Class 31 on top of 6 or 7 mark One or mark Two coaches, give it a real test over NTP. At the moment, even going Off The Rails all we can do is either drag freight or a dead DMU with it.