It was the visibility of the vallum and the fact that its ground surface is contoured that jumped out at me. Funny thing about the Ai is that one stretch of wall and its milefort are rendered as stonework (albeit too high) so I guess it might correct itself. Agreed on Vindolanda, Housesteads also has a couple of random buildings but as you say, so much better than what we had before.
Need to get some time this weekend to have a look at the Avebury add-on that has just come out - Avebury & Surrounding Area • Microsoft Flight Simulator
Ref the Otford villa, yes that’s the one. Fascinating site as the excavation is of a villa that was sytematically demolished rather than abandoned - https://romanotford.org/