I also think they roll in all of the small tweaks and suggestions for changes too. Some of my suggestions for minor fixes actually made it!

I looked at the captions, it still in no way indicates that it's a Balanced Armor set. The armor is robotic and tank-like. Something we are told over and over are not only main features of the Sith Warrior, but represents strength and endurance. What I am trying to say is that the armor sets on the left are after AC option. They represent exactly what a SJ and a SM are about, enhancing tank abilities and enhancing dps abilities (respectively). The armor sets on the right are (imo) lower level armor that is more generic. We see this in the fact that both of them are not as detailed and they seem more basic. They represent a Sith Warrior in which is still choosing his side. They represent (imo) a player who is leaning toward tanking (top) and a player who is leaning toward dpsing (bottom). Of course we have nothing to support this, because we don't have tooltips. But it fits better than the "balanced" speculation. If your good at everything, your not great in anything, thus making the Balanced only fitting situational PvP and maybe if we're lucky PvE. There has to be distinct lines, but there can't be priorities. What I'm trying to get at is that although your skills sets show that there is a way to be balanced between two (archetypes or roles) doesn't denote a balanced armor set. Very, very, few games have armor sets that work perfectly for two (archetypes or roles). This doesn't mean ToR has to follow in their steps, but it'd make less sense to have a balanced based armor sets.

Or even in simpler words. These pictures could be a foreshadowing of the two ACs. The top is tankish, the bottom dpsish. The top right still shows a evil robotic superman and that is what a Juggernaut is seemingly supposed to be.