Maybe. I suspect it's more of function of SIU being forced to prioritize who to focus on. Either that or he really does have something he's saving Androssi for.I get the feeling he doesn't exactly know what to do with her (or most characters in general), and that he dislikes drawing her fights. Androssi is a pure upclose combatant who relies on punches and kicks which generally involves some level of choreography. But the series have evolved to not much more than shooting energy beams at each other, and when there is fistfighting, it is extremely simple - just check out Zahard's punches against Baam. From an artist's viewpoint, drawing big flashy energy beams is a lot easier than drawing choreographed movements. A drawn out fight with Androssi would be more of the punches and kicks we've seen as of late.
When I think about it, this isn't anything new. He had Androssi lose during the hell train station with some idiot excuse like she didn't know her name would be taken. That was especially dumb when the train station tells you when someone is taking your name, and counts down from ten. Then he never shows the fight itself.
SIU's never been one to shy away from drawing difficult things