The only halfway logical justification to me for Twilight (the other Mane 6 and Spike, who had at least been present if not involved) to create the Unity Crystals is that it has something to do with the destructive power of the Windigos.
As Tirek said, Windigos are Ancient Magic. And it would be “unwise” to leave them unchecked. This sentence is always disregarded too quickly for me personally.
If the dispute between the three tribes was really so bad that Twilight saw no other way than to lock all magic in the three crystals for safety, well, that’s actually a course of action I can understand.
So far so good. But and here’s the unpopular opinion:
It just doesn’t make sense…
If Twilight and the others really created the crystals for this reason, how on earth did the harmony of the three tribes fall apart again? And why was Discord so panicked after magic returned to the world?
Twilight aside, I would like to know the reason why Discord panicked. Well, Twilight and the others are (presumably) no longer around. And some “random” ponies have apparently managed to bring the three crystals back together, exposing the world once again to the danger that comes with it. I don’t know if Discord really knows that such a power as magic in the world of MLP G5 brings certain risks that the ponies of now can’t know about, and he’s really worried, or if he just doesn’t have faith in the ponies of the new generation.
For me personally, both could make sense. From Discord’s perspective, it’s (presumably) just dangerous to bring magic back so eager, no matter what benefits it brings to the three tribes at first glance. A danger that Sunny and the others don’t (can’t) know about yet. Thus Discord’s behavior, no matter how it may seem, makes sense. Or, Discord is simply Discord, and has no trust in hardly anyone else except Fluttershy.
Okay, he had some trust in Twilight to a certain degree and acted idiotic because of that, because trust is just not his thing. Or, despite his obvious omnipotence (and presumably his chaotic nature), he just can’t really assess certain things in the world very well. See Tirek. See what would probably come out if Discord and the real Grogar ever met. In my personal fan theory, Grogar would simply wipe the floor with Discord. Not because Discord is incompetent. But because there is always a bigger fish/shark in the pond.
So something very crucial is missing so far. And either the writers are aware of that and risk a lot here (among others the displeasure of the fans), or they already have a suitable explanation ready, which will amaze everyone.
Too hard that IDW and Hasbro had never been sources of reliability to sell really well thought out stories. Or rather, hardly at all. I am not yet fully ready to accept this nonsense of the “creation of the three unity crystals” about “all then lived in peace” until “all is lost and the tribes are separated” (missing any explanation) without having seen the whole picture.
But woe, if this is another half pieced together thing… Then I will still remain a fan. That’s for sure. But I’ll dedicate my life to slapping this around the faces of every writer at every convention I go to at some point in the future. And with delight. ;-)
Nah, just kiddin’. All the flights to the USA alone would eventually drive me into bankruptcy. (laughs) ^^