Yes, that would be my personal preference.

I'm afraid "show up at 350k" is the tiniest river we currently support in our database. Perhaps we should omit all those smaller rivers altogether from Sweden, rather than include them at 350k?

Yes, but too much of a good thing... :-) See below.
I don't see that it would. At zoom level 1:1,000,000 only the very largest rivers are shown. As you zoom in, more and more rivers appear. At 1:500k, all major waterways seem to be on the chart. If you continue zooming in, at 1:350k or about, suddenly a very large number of minor waterways appear. Almost all of them are too small to reasonably be shown at that zoom level or even at 1:250k.

It would be better to have them appear first when you have zoomed in beyond 1:250k. 1:100k seemed reasonable to me.

Wasn't your original complaint regarding the fact that fewer rivers were appearing? Your new suggestion would mean that NO rivers would appear until you zoomed in to 100k. Most people do not zoom in that far.

Yes, indeed! That's why I would suggest that all rivers shouldn't appear until 100k. It clutters up the map too much already at 250k.

I'm glad you are pleased with our improvements.

Unfortunately Sweden do not give us enough data to differentiate between larger rivers and smaller rivers, which is why most rivers were omitted in the first place. My only available concession until they improve their data is to make all rivers appear at 350k. There are too many to make them appear at 500k; it clutters the map too much.

Sadly it isn't practical for us to make secondary roads appear at different zoom levels per country. We might be able to change this in the future though.

I'm much happier with the Sweden charts after the latest update, thanks a lot! I particularly like the new "Points of interest".

If I may ask for any changes, it would be this:
"Small" waterways and secondary roads seem to be rendered only at scales of 1:330 000 or larger. Most small waterways are really to small to be rendered unless the scale is at least 1:100 000, say. On the other hand, the secondary roads that are included are actually large enough that they should be rendered even at scale 1:500 000.