I think could be a good idea that trait combination since the meta is too static and ZzZ... Besides Kinetic Accelerators works well with Karakosa, but for me I run most times Gyroskopic Acceleration as standard trait and Ex Machina. In this way bring good superspeed and good barriers, and personally I pref Anticorrosion Plating in Inventions tree vs MDF, so the extra protection with 2 Function gyros works better.
I think scrapper dont need System Shocker, and the extra stab for Mass Momentum with Ex Machina is good when your party/squad lacks mesmers or guadians for ex but the standard way for me is Gyroskopic Acceleration.
Kinetic Accelerators is still good for me too but I think we have enough blast without it and usually my team have no problems with power and fury so...