If you want to play DS in arena, just go over to fleet arena. Completely the opposite situation there - chimera or executrix, itf, fotf, Tie X2, scim, reaper, slave1. Like any good dark side team, they offer up Biggs as target practice. I run Endurance in a field of DS leads, so I understand the frustration with being a target.
In regular arena, I've seen the zThrawn, shore, storm, DT, Tarkin combo do well. And there's a guy sitting top 10 with a super fast NS squad with g6 zombie. But they're big exceptions to all the Rey, cls, and gk leads, and the recent FO additions haven't made much difference. Don't see fleet changing from DS anytime soon either, especially with more chimeras on the way. Maybe we'll get some decent reworks on existing heroes soon (BHs?). Can't see more DS releases making any sort of immediate impact.