Another problem with Mortis was its lack of internal consistency.
The entire pretext for Father summoning Ani there was that the former was supposed to bring balance to the Force by taking the latter's place, using superpowers to bring the Kids in line. But at the end of it the guy has apparently changed his mind and calls Ani's killing of Son to bring balance to the Force, without there really being anything to prompt such a change of heart. Nor was it made clear that he had changed his mind, it is almost like the third episode forgot what was established in the first one.
Obviously the real way to bring balance is to do what Ani did, kill the dark side, which he did both on Mortis and on DS2. So one has to wonder what the point of the original mistake even was. If it was solely as an excuse to throw a bunch of filler that never amounted to anything at us, the least they could have done was clarify that he made a mistake, and the RotJ way was truly the right one.
Yet another problem is that these filler characters are implied to matter in the grand scheme of things, when they really don't. Father's mistake got some heavy support in the first episode, suggesting for a moment that Ani might in fact have been able to balance the Force by taking his place. Which would have meant controlling the Kids would have a real effect back in the GFFA, as if these were embodiments of the Force. Yet when the whole family dies, nothing happens. The Force doesn't die, it isn't weakened, the Council don't all fall over in response to a disturbance in the Force. Nothing.
So to sum up:
I discuss to learn, not to win. Then again, learning enough tends to translate to victory in the end anyway.