I guess this was not always the case. There are several pictures showing the dots on both the OMS PODS LRSI and HRSI tiles.Great work on the textures! One thing though: you should remove the dots from the center of the tiles on the OMS pods. On the regular fuselage tiles these are the locations where the tile waterproofing agent would be injected, but the OMS pod tiles never had them.
I have attached a photo of Challenger's OMS pods, taken during STS-41B, showing the lack of waterproofing injection sites.
These are just two examples taken from STS-117 and STS-127
So what shall we do with SSU textures?
1) keep them
2) erase them
3) make them less visible (some fading effect)