They were somewhat unbalanced to be fair. Celestial Opposition didn't just extend normal damage buffs by 10 seconds, it extended Lucid Dreaming, your potion, Lightspeed, HoTs, Shields, your Earthly Star and probably something else that I forgot about. It didn't just make Ast an rDPS powerhouse but allowed it to run almost no piety and pump out healing so powerful it made Whitemages cry in a corner.
But as overpowered as it was, both Celestial Opposition and Time Dilation involved actual decision making, something severely lacking nowadays.