Wow, you call that a very broad preview, nice to read. Altogether quite a lot of opportunities for the Polish athletes.
Netherlands also has some opportunities, but not as much as Poland. We 'only' have Dafne Schippers at the 100m and 200m (silver in Rio), but honestly: she's not going to make it this time. A lot of sprinters are meanwhile a lot better: Dina Asher, Shaune Miller-Uibo, Elaine Thompson and many others. And Sifan Hassan at the 10.000 meters. But there will be a lot of competition from Kenia and Ethiopia.
Maybe there are a few other slight chances: Femke Bol (400 hurdles), 4x100 women and Nadine Visser (100 hurdles). But not very realistic.
You're right: most important is having exciting competitions, but ... still nice when your own country wins some medals :-).
And to finish: a nice weekend for you as well!