I'd rather the Defender became worth it's current points, than for it to be costed appropriately for it's current stats. Buffs, not cost reductions.
The Defender needs action economy- 1 focus token doesnt cut it when a naked generic is a third your list. I'm a fan of the "Focus token at the start of combat if you have a shot" fix, even if it ends up costing 2-3 points on top of the current defender, because a generic gets 2 tokens for defence if played well, and the aces get more alpha strike options.