D_M_2 Thank you so much for taking the time to give such detailed feedback! I I will set up a forum thread for that soon too.
1. We are looking and bringing in a size option for the slicer handes. And more control of the colors, including the rail behind.
2. We will look into the spacing you have pointed out
3. The calendar itself is part of UI, so it won't be configuarble directly by report authors. That way it matches to light/dark mode in both browser and mobile.
4. Yes, the slicer visual has that limiation and we are looking at brining the header icon clear selections here too. Would that be enough? You can also use clear slicers action button too to have it indepenedent of the slicer.
5. It is aligned to the container the icon is in, and I will take this feedback to investigate further.
Thank you!