Even after playing through the Galactiic Wars and another day of challenges....
The Defensive bar just feels like a tacky reminder that health bars shrank, in everything but pvp it matters for all of the first wave of a fight then it's pretty much gone. In the case of Galactice war I think I had a little bit left on one character after fight two.. Then it was the same thing as any other day, except less green over my teams head.
The Challenges are a little more cumbersome by the damage nerf, I'm all for the bosses requiring some thought.... However, the Attacker Challange can't have been tested or wasn't implemented correctly, it just wasn't do able with the absured health pool the bosses had. Today's challenges are doable, but again health felt over tuned. It was more a matter of luck than actually being able to shut down the drones before they could murder half the team, but I guess the answer to that is using very key team builds... Which would be ironic considering the idea is to make more characters viable.
In the end, I'd be glad to see Defense redone or just dropped, but I can live with... But the Challanges especially the attacker needs attention before it rolls around again. Maybe speed things up a bit, or just make the lead up to Bosses in challenges less monotonous or make them more colorful so they are at least interesting.