UE4 4.24 SSGI + AO Implementation

Most of what you said is just false. The building is not low quality, it’s simple because its representative of a future development. It looks how it is supposed to look.
The materials are very accurate according to the Epic guidelines, the “scene materials” are not very visible to you, and the ones that you can see are accurate. Im not sure what assets you are referring to, Im assuming none.

But you are correct regarding the skylight.

SSGI and skylight stationary, lowered the bottom to .15

Its a lot darker, but as flat as its ever been.
So although its true that it was too bright, its not true that it was the reason occlusion from the SSGI was weak.

Same as above with RT shadows on for the skylight