I installed via steam.....What I am noticing is that a small class D airport like KPTK and KVLL (local to where I live Michigan) actually have good building and scenery etc. But a major airport Class B like KDTW(Detroit) has only tarmac and runways !!!!
I did not purchase any custom scenery just default stuff.
As a side note. After Steam installed I noticed that a whole bunch of world scenery had been installed. I could see this in that steam window. So I unchecked everything except the US......will this cause this issue.