I would like to see a 90% invisible vagabond instead of a 100% invisible one.

A good vagabond can go 20-0 or 44-4 fairly easily. It is undoubtably the most powerful race and therefore sticks out as better than the others.
There are defenses, but a smart vagabond quickly realizes that buying a necklace negates most of those.
It seems to be a game-balance issue. Reducing the the total invisibility would go a long way to making this a more balanced race.