Probably because when they developed E-G, they didn't need those platforms at the time, so decided not to put in the extra work.
The rest of the Train Station is spot on so can’t use the excuse Rivet is being lazy. They have done an absolutely fab job with Waverley and I do mean that as I have been there many times in my life.
All we can hope is that Skyhook is able to poke Rivet to model 8 and 9 properly to assist with the E2G timetable.
Yes, the only difference I noticed is that Waverley Steps are modelled in Fife Circle version, whereas in E2G there is just a wall instead of exit