How is the Shifter on it’s own, and can it be made to work?

[Mara]

Except, as stated, that happened in the background, since this character is starting already fallen. At no point are they played with an undefined move speed.

I don't CARE what the answer is, because at no point do I intend to touch an ability written by someone who decided putting a daily limit on talking was a good idea. You can use whatever interpretation you want, because the end result doesn't MATTER to this.

The only possible outcome is that you can't play the archetype even the background calculations pause until you address the undefined move speed question.

At my table you would be stuck in oozeform until you atone. Because I don't consider Oozeform as SU or part of Fluidic Body or a Polymorph effect.

I wanted to talk about this under your interpretation but since you refuse to give it, I'll just have to say your exploit doesn't work.