The New OP have very sad theme...I guess the series finally get serious and I like that how Akiha's QT-ARm become phoenix alike in the opening theme.
Spoiler for Episode 15 Spoilers:
Why is Nami stronger and better than Akiha in term of using her skills & fighting is really beyond me. Nami actually fighting against Akiha in QT-Arm with her human body.;.... I guess DarkSide indeed boost a character power to max while the good guys have to work for it.
and Leopard got owned by Kagura...I wonder what she done to Leopard