I think so. What we have here is just permission to use the temporary powers rules.
I honestly don't know what would be best for Superior Transformation.
My first instinct is usually to make Superior magics remove irritating little foibles in the kind of thaumaturgy that they enhance. Like Superior Warding removes the need for thresholds while Superior Conjuration removes the fake-looking-ness of conjured objects.
No idea how to use that approach with Transformation And Disruption.
On a related note, I've been wanting to write Superior Crafting to represent Luccio's Sword-making skills. It'd let you make items with multiple effects, and it'd let you give other people items that they could sustain with their own slots. But I can't think of a fair way to write the latter effect.
You seem like the person to ask here...so how would you go about that?
PS: I'd also be interested in hearing any ideas that you have for Superior Biomancy.
The more I re-read Transformation, The more I think you're right. Here's What I came up with...
SUPERIOR BIOMANCY [-2]
Description: A master wizard can refine his skills in a particular area so fully that his abilities are qualitatively different from those of a normal mage. While normal specialization simply makes one faster and stronger and more effective, this level of focus provides entirely new capabilities. Listens-to-Wind is so practiced at Biomancy that he more than held his own against a Naagloshii in a shapeshifting combat in the infamous “Turn Coat” Case File.
Musts: You must have both Evocation and Thaumaturgy with at least some specialization in Biomancy in order to take this power.
Sponsor: This magic is self-sponsored.
Agenda: As self-sponsored magic, this power lacks an agenda.
Evocation: Superior Biomancy does not provide any form of Evocation.
Thaumaturgy: Superior Biomancy does not provide any form of Thaumaturgy.
Evothaum: Superior Biomancy allows its user to cast Biomancy rituals with the speed and methods of Evocation.
Extra Benefits: You may use Superior Biomancy to produce minor alterations in your own physical Form (Eye color, Height, Skin tone, Hair length/color, etc.) as a Mundane Effect, Producing an effective disguise. Under scrutiny, the effectiveness of this disguise is determined by a Lore roll.
Note: Because this power requires Evocation and Thaumaturgy, it grants no focus slots and does not have its cost reduced when the user already has spellcasting powers.