Regarding the issue/argument/frustration over how to rule on a cyber limb...
Technically, you use your core for most all muscle related movement. Since limbs have separate stats, the character's Physical Limit represents what is left of the meat body (any limbs not cyber and torso too). So, even assuming four fully maxed out limbs at Agi and Str 9, they are still attached to a meat body. I'm assuming no cyber torso.
So let's assume a Bod 3, Rea 3, Str 1 character. His Physical Limit is (2x1)+3+3=8/3=2.6, round to 3. He sprints, using his Agi 9 legs for base rate, and Str for dice pool, but is limited to three hits. From an in game point, because his legs are jacked to the max, hes way fast, but limited by his body and can't push it past three hits.
This now make hydraulic jacks more appealing, as they add not only to distance, but to your Limit.
Also is why I think a house rule allowing cyber torsos to have Agi and Str scores makes sense (and it doesn't explicitly say as shells they can't). If someone wants to spend a base 5.5 Essence and boatloads of Nuyen for a maxed out Agi and Str, they should get it.