It’s not perfect of course, for example I feel that transport icons could have unified size while being more diverse in shapes (and initial zoom levels) to avoid mess like this:
Another interesting thing is that they plan to render tiles for different languages. Currently there are ~300 Wikipedia language versions, so I’m curious if they plan to deal with rendering all of them. Current state of internationalized maps is beta - there are few countries picked for testing and you can see how they look like for your language:
Since maps can use different languages, soon we will face the problem of adding localized names for countries and places (fortunately, their style currently uses just few types of labels). It would be good to prepare step-by-step guide to help them to resolve this issue:
Unfortunately currently Wikimedia Maps won’t be actively maintained, and even latest release was done just by popular demand, out of schedule, but the plan is to get back to them after some time, especially if upvoted during Wishlist Survey this fall: