Yeah, you'll probably notice those extra roads are yours with extra paths added in using the same palette. I am... not an artist. I was going to do the others, but after roads I was mentally done lol.
But for the gen the rivers and stuff are fine as 4-directional. I just needed 6-way roads as the player would be placing them and they'd probably find it odd to not be able to go up and down. Without your originals I definitely wouldn't have been able to add in the extras :P