Fists tends to be more useful for the non-vanilla critters out there that can pick up things like Claws (possibly with the addition of Venomous)
After all, if bare hands and feet were as good for combat as a high-powered assault rifle, humans wouldn't have gone to all the trouble to invent the damnable things

a few notes on the details of your assessment, though:
"'brass' knuckles" can be easily argued as a reasonable tool to use with the Fists skill to gain a weapon:1 attack as well as the potential to satisfy catches
it's the most easily justifiable skill with which to perform a maneuver to switch to Might for a grapple

evocation really isn't in the same ballpark
using it forces the conflict into rocket tag, as your self-inflicted stress hastens your own defeat unless you pop the opponent first
it requires multiple skills at high levels to use effectively
it comes with the risk of backlash and fallout
Laws of Magic
BUT: can easily be used to justify far more diverse effects (diverse maneuvers, exchange-spanning blocks and even armour without additional actions, better spray attack options)
can't be disarmed

The inclusion of ectoplasm in a spell is mostly just a matter of fluff.  Design and cast the spell as per normal procedures.  If the concept of the spell necessitates that it create physical material, then that spell summons ectoplasm to fill that role.  No additional game mechanics involved.

Glamours (and Greater Glamours by extension) act neither as evocations nor as thaumaturgy.  They are simply what they are.

Used to effect a Veil, the character rolls their choice of Discipline or Deceit, which functions as a block against Perception.  Since neither power mentions a duration, it's probably best to assume that it lasts the scene (or until dispelled or dismissed).  Greater Glamours offers an additional option of either a +2 bonus or an enlarged veil.

Similarly with Seemings, but with a more subtle, and versatile, deception.  Greater Glamours provides a +2 bonus.

True Seemings is effectively just a license to say 'yeah, I have one of those right here' for whatever you might need in any given situation, up to and including the ill-defined 'creatures'.  The limits of this power do not seem to be defined.

It belongs as sponsored magic.  Remember, sponsored magic doesn't need some being able to cut the strings (Kemmlerites are an example).  Using and restoring your soul are handled by Debt pretty well.

I think that would be better handled by taking consequences (possibly with the availability of soulfire granting additional consequences useable only for the purpose)

Kemmlerian Necromancy is similarly problematic, in that it is not actually sponsored by anyone or anything (from what we've seen in the novels).  It is simply learned.  It, similarly, is a questionable inclusion in the Sponsored Magic section.

  And Harry DOES make magical constructs with it, stuff he couldn't do otherwise.  They even talk in the book about how Soulfire makes such things last longer than they otherwise would (say a scene instead of an exchange).

Harry does not use soulfire in any working where he is not also using his conventional magic, though.  There is no instance of him using ONLY soulfire.  That's the province of beings such as Angels.

Well, Harry doesn't every (not even once) use Soulfire in the absence of conventional magic. (mystical rebar, as the book calls it)

Frankly, I don't think it even belongs in the Sponsored Magic section, given its nature, and the source of its fuel (it's SOULfire; by using it, you burn your own soul, not some energy provided by an external power)

Ahh, yes, possibly the demon-summoning warlock.  Though, it is hard to say whether he could do more than summon demons and some thaumaturgy.  Kid Warlock at the start of proven guilty?  The guy could manipulate minds, but there's no reason to think that somehow means he could be a full-fledged wizard.  Like Harry says, even a focused practitioner can be deadly.  Honestly we can't tell if these guys are much more advanced than someone like Binder, who while deadly can't be a full wizard.

The demon-summoner was described as a Sorcerer in Harry's little dream-reenactment, good at the flashy-destructive magic far more than anything else.  That's why Harry's job was to lock him down.  So we have evidence of him pulling off substantially complex thaumaturgy, and being capable of pulling off substantially potent evocation.  I think that's sufficient to say that he likely could have been a wizard with the proper training (and early intervention)

as for the kid, we have very little evidence of what he was capable of, but enough, I think, to list him as having been a potential candidate, had he received training (and intervention) in time

Did Soulfire receive major edits since the preorder version?

High skills.