No where in the quotes does it say BARELY, that's just BLers being cynical about my methods to prove Medea. The fact that it's so strong it ups to her an entire tier and the fact that it's a dragon which are said to be some of the strongest creatures in the Nasuverse is no small feat. Even if it's a weak dragon it's still a dragon.
Really though, Ex magecraft? That's pretty darn ridiculous to just give someone regardless of the situation, unless it had been previously stated, I don't really care about any of the other things you wanted to use but that particular skill is really baseless. (Well that and the Ex ranked Magic Resistance but whatever one thing at a time.)
Just because I like to use U/C to help fill in holes that are most oftentimes left out unexplained does not mean that my statements do not carry any merit. Really if you want to go there, the fact that Nasu supervised the game gives it just as much basis as Aprocrypha has.