I basically had the same experience today. I used SSA in its previous location and it wasnt great but was better than WDR
I'm seeing another issue -
Pulsing, which I believe is directly related to how much light is available
I noticed it early this morning when I hung the 4K-T and again later today as the light begins to fade..
Running 30fps, 10240 bitrate and Iframe of 60
When I run Iframe 30 (matching FPS as I do on all my cameras) the pulsing is just faster. 60 helps but its still there just slower. Reducing to 15FPS/15 iframe provided no change
Daytime bright sunshine it seems ok, but its there
View attachment 162674
Watch the area circled Red
View attachment 162678
Now close to 7pm and sun is starting to go dimmer - 30FPS/60Iframe
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