I wish I could post my photos (maybe the problem will get resolved soon) because the photos of the plugs (both drain and fill) from my 2015 at about 60,000 miles look about the same as the OP's. I was finally able to look at the link the OP posted on my computer and compare my photos to those side by side on the high-resolution computer screen. Therefore, I again recommend a fluid change before expensive repair work that is probably not needed.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019