Really nice map, I like the colours and textures chose.
Concerning the scale, and by considering that the territory’s divided in 4 equal parts, 14 days seems to me to be good (nearly 7 days per country). It represents little countries but it’s correct. On my map, the Pays de Tía (which is a little country) can be crossed in 5 days.
Concerning your map, I just see something that seems strange to me. It’s the end of the sea in the corner on the top at right. The angle that makes the coast is very “marked”.
I like very well your colours but the blue of the sea is perhaps slightly too “strong”.
Otherwise, it’s a beautiful map