I would go even farther and limit availability to 4 (maybe with one item of AV 6-8 allowed).
Also, limit Attribute (esp. Special Attributes) and more importantly Skill Ratings to reasonable levels. And put a limit on how much resources one can have.
Limiting Attributes to 4 (one at 5) and Special Attributes and Skills to 3 (one Skill at 4) makes sense, IMHO. Also no more than 10-20 BP in resources. Make used gear (esp. cyberware) available.
Contact Connection Ratings of more than 3 also seem out of place for street level (there are exceptions, of course, like knowing the Don
).
Some Qualities break these constraints, so they should be run by you on a case by case basis. Sometimes it makes sense in the context of the character, but sometimes it's purely to break the limits.
Bye
Thanee