After giving all this attention to the CWOP analysis wind vector, I decided to see how all the stations near me were doing in this regard.
Well, none of them looked much better than mine did. They all, like me, got two thumbs up but no big, green check mark like all the other parameters. All of them had a noticeable divergence between direction observed and analysed as well as divergence from speed.
The wind vector is obviously the most difficult one to agree on and most affected by your particular siting.
I would still like to fine tune it.