Or in a less jaded view, they decided to try a very low cost fix before pulling the trigger on a very expensive site navigation redesign. Or, even better, this showed a partial improvement while they worked on the navigation redesign since "turn it yellow" takes 2 seconds and redesign the navigation takes much longer.
I like how this reads as jaded, was actually just an attempt at a bit of humour! Of course I agree with everything you said, that's probably what it actually was.
I've still not learned, probably never will, that tone rarely comes across in text :-)