It always makes me wonder how Beast Unit-02 would fare with Asuka as the pilot. I mean Mari's strategy, or lack thereof, really doesn't differ from a raging bull trying to take down its obstacle with brute force and little tact. Asuka, on the other hand, can back up her ace pilot status in her performance. Swift, versatile, flashy(LOL), she can utilise the power of Unit-02 to a very high degree. We all see Mari's battle against Zer and it pretty much characterises her as a person who would stop at nothing to achieve her goals, even if it means death and destruction. At first, her strength and control over Beast-kun is promising in the battle but its power was not harnessed to its full potential because Mari didn't have any other plan than RUNNING STRAIGHT AND SCREAMING, TWICE!
Asuka is more survivalistic and so she would probably be able utilise Beast-kun to its full potential using skill and strategies.
On a tangent, I always get grossed out by the fleshy sound when the limiter tubes are ejected. EUGH! How did they replicate that sound so graphically?
Anyways, just my two cents