According to a post a few days ago on the “talk” mailing list https://lists.openstreetmap.org/pipermail/talk/2019-October/083394.html , “EV7 is completely wrong in OSM from the south of Prague to Nahoruby, including unrideable tracks and a suggestion that cyclists use a “ferry” that in reality is a tourist boat that only operates at weekends”
I’m not familiar with the route here at all and I’m sure that the corrections that you’ve done are correct, but there still appears to be more to do. Looking at https://www.openstreetmap.org/relation/2775754#map=13/49.8701/14.4146 , there are still a few gaps, and further south the “ferry” https://www.openstreetmap.org/way/25133308 is still part of the route.
