It has two flaws, neither of which is the maker's fault. First, Norway's coastline is insane. It's incredibly difficult to follow, but the maker does a fine job making the connections intuitive (or as intuitive as they can be, anyway).
Second, this map gets very linear in the north. Again, so does Norway. I might suggest using a few coastal territories as ports that connect up and down the coast. For example Halden > Larvik > Farsund > Stavanger > Bergen > Solund > Selje > Smola > Fosnes > Traena > Rost > Lenvik > Hammerfest > Vardo.
Suldal should connect to Vinje. Namsskogan should not connect to Bindal.