Regarding the Weapon Specialist (and most of teh SR4 Archetypes)... The problem is, they were written with the idea that most characters would have dice pools of 8-10, with characters that had 12+ being extremely exceptional and rare. Skill of 3-4 and Attribute of 3-4 was supposed to be the norm for runners.
That was, at least, the original intent of SR4.
Yeah, it didn't work out that way, never did, never will. Part of it is players perceptions, part of it is the 5+ success rate meaning you know exactly where your success curve is at, and part of it is simply how cheap and easy it is to softmax out things. Plus add in how ridiculous it is to get bonus dice to certain tests...
<shrug>
As always, your mileage may vary..
Bull