To be honest, I wasn't expecting it either...it just kinda happened xD. Glad you like it though! :)

-Right! So Illesia is used to fleeing and will obviously fight in the battle, but once things start to turn in favor of the Qyaari, she'll want to somehow carry on the legacy of The Five and return to their original homeworld. That'll be the final battle, which probably won't last very long considering that she's been feeding The Five this entire time through the Force(good ol genetic mutations manipulated by the Force XD) 

-That's what I'd assume, too. The Five are powerful, but not powerful enough to take down the entire party, ESPECIALLY with Roan coming to help. 

-Yeah, this arc should end pretty soon. I feel like the Xiis have been a good Act II in the sense that they were a viable challenge, but they weren't overwhelming AND they will be motivation for the Elders to press for even more Academies/training facilities across the galaxy to make sure threats like this are neutralized quicker.

Edit: DK?