It depends on whether you see avangions as aberrant on not. Their final trip through the planes in a crystal casket as the final state of metamorphosis suggests that they are outsiders. Many people have argued for that.
Well, they aren’t true dragons. They are subtype [augmented] type [dragon]. There are many creatures with the type [dragon] that are not true dragons. A wyvern has the [dragon] type, but is not a “true dragon” in the sense that it isn’t the greatest of the [dragon] type. Draconians in the Dragonlance setting are [dragon] type also. You could say that you are I are [mammal] type, but not one is mistaking us for a cat which is also [mammal]. The important thing is to not confuse the type with other characteristics.
Why? What is the problem that you are trying to fix?
Dragonlance 3.5 has you covered. Dragonlance has extra size categories for its “dragon overlords”. Check it out.
The 10th stage of preserver metamorphosis is literally that.
That’s the way I see Rajaat’s creation of his champions. Lifeshaping is ‘analog’, and Rajaat skipped digital and went straight to quantum mechanics by using magic and psionics to turbo charge the lifeshaping.
I could get on board with a subtype. A type not so much.
The mandate only goes so far. That’s why you don’t touch the XP table or produce a different XP table or reproduce core rules like Pathfinder. I don’t think WotC cares one way or another, unless we deliberately slap them in the face. As long as we operate as athas dot org has done until now, there will be no problems.
BTW, publish your edited DS3 work. Sébastien Gamache at Siltskimmer already published his fixed bookmarks version ages ago.