That's why there were other modifications to use the inertial control systems better
. Also mentioned was that even though they can be used like tentacles like the first shift Schwarzer Regen, the wired knives are treated more of a retrieval system. It's not impossible to wield them all at once but it's somewhat impractical(and as mentioned, would take a lot of processing ability by both pilot and IS, unless they were designed specifically for micromanaging like Glas Heart). Until I imagined that they also had a little VT data in them which allows the individual knives to meld into a giant wired blade...
