Actually putting the huge label in the middle just wastes space for anyone looking at the map regularly, or for printing. You already know what you're looking at at this zoom level, or can zoom out.
Google maps does terrible job by missing labels for half of the city parts.
Not only does the mapy.cz version look terribly blurry compared to Google Maps, it doesn't do nearly as good of a job putting interesting waypoints in the right location (e.g. the label for "Prague" or the river name going along the river).