I noticed the islands too (apparently only islands above a certain size "qualify" - of the Canary Islands you only get Gran Canaria and Tenerife, of the Galapagos Islands only Isabela, of the Azores - nothing), but all European "microstates" (https://en.wikipedia.org/wiki/European_microstates) are also not shown, some of them (Liechtenstein, San Marino) not even as labels.

Agreed. I get that there has to be a trade off between size and coverage, but if it's a map it should really have the option - at least - for the person implement it to choose density. Personally, I'd want every island to be at least shown as a blob.

The label is a blob.