hi hi
While this is somewhat tangential to the WS as written, one option for mundanes is to spend some money and buy their awakened friend a sustaining focus, and maybe some favors to help cover the karma cost. It has its up sides and its downsides, but it is a viable option.
If I were trying to play an unaugmented mundane, I would make sure they had an edge of at least 6.

My guess is that the weapon specialist as written was purposefully toned down (edge 3 and the
lucky merit, really?) as an example of what kind of characters people might bring into a low powered campaign. Show a little diversity and such.