I don't think that letting the Dementors eating a descended soul is a good idea perso .... who know what that could make to them.
Full?
Let's clear up a few misconceptions.
The Ori as presented in Stargate were presented as big bads because they had powerful technology, rabid followers, and the powers of ascended beings. They're almost cartoonish as presented. However, let's look at what they did:
- They were religious fanatics that attempted to wipe out those in their society who followed the path of science, ultimately driving them to flee their entire galaxy to another.
- They explicitly and deliberately lie to their followers so that they never ascend, so the Ori never have to share power; they keep their followers technology primitive, so they never become a threat.
- They massacre any planet that refuses to convert, and torture and kill individuals that refuse to do so; they used one inhabited Jaffa world to create a black hole so they could build a supergate (instead of, you know, using one of the black holes that we already have in the galaxy).
- One of their favorite tactics is to release a lethal plague on their target populations that only their priors can cure.
- They burn heretics alive.
- They impregnated a woman against her will to create a messiah for their religious crusade.
In short, the Ori are what the Goa'uld aspire to be. They are every bit as evil, if not more so. So, if the Family will drop off the System Lords to be hunted by Predators, I see no reason not to drop the Ori in a pocket dimension filled with Dementors.
Let us not forget that Taylor is bonded to an ultra-powerful, ancient creature that used to fight in demon wars. Her first reaction to Amy discovering her identity was that it would be a shame to have to
kill and eat her. The reason the Family is so pants-wettingly terrifying is that when the line is crossed, you're dead...and they're not afraid to make an example of you if it helps keep others from making the same mistake.