I will admit from the start that I've not done Salvage before, so correct me if I am mistaken at any point, but I can't imagine for a second that anything being done with Cura could not be done with any other tool just as effectively, particularly when taking any risks into account. As you have said, it opens up the possibility for a different style of playing White Mage - which is fine, and should certainly be encouraged - but it's neither groundbreaking nor revelant for the vast majority of content or players. At best it is an alternative - one with potential risks - and at worst it's seen as a "feature" of White Mage by developers that justifies not creating more interesting spells (or giving them to other jobs, notably SCH).

I'm not saying it doesn't work - indeed, you've shown that it can and does - just that it's not actually a unique asset for White Mage 95% of the time. With developer time supposedly as stretched as it is, spells like Cura are more likely than not hurting White Mage rather than helping it. It's yet another "well it works on paper!" idea, as far as I am concerned.