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Barrier as a creation magic, I would rather not. I would rather "spirit" magic or maybe "rift"? If you can loot some potions here and there, that can solve some problems of this game make the hardest difficulties more accessible. The last point that may be possible is a better explaination on how the power works... and then the system of crafting including enchantment ( Who said Sondal?!!).
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I was not talking about the gameplay-aspect, that is talent-tree classification, merely about some background-blurb that DA:I's Barrier-spell is supposed to be of the Creation-school. Quoth self:
I'm thinking it would help if this "Barrier"-spell were something explicitly classified as of the Creation-school. Add some snarky codex-entry that claims it's all the rage with Creation-magi due to it being "fired and forgot" in the middle of battle and it'd be sufficient justification on the lore front.
Would even make sense for that school in-sofar that it actually prevents wounds before they are dealt, saving the Creation-caster from performing mid-combat "surgery" as the developers apparently likened this to, a rather hard feat to do even out in the woods while not fighting. That BW can acknowledge that gameplay-changes of this nature do not make too much sense they showed as regards thermal clips in ME3, as I mentioned.
That aside, DA:I's Barrier seems to be different enough from DA2's spell of the same name anyhow, and BW merging certain elemental magicks and magic schools into one talent-tree wouldn't be an entirely new thing either, as we already saw this in DA2.
This way, Creation would still be present as an actual gameplay-ability not locked away from the early and mid-game and see more regular use. I may have personally preferred to still have dedicated medics available in the party in this game, but this would be somewhat serviceable.