The Gene Keys is unusual among systems of this kind in refusing the language of correction, and the refusal is structural rather than a matter of tone.
In most frameworks that name a negative quality, the negative is something to be removed, managed or compensated for. Rudd's Shadow is not. The three frequencies of each Gene Key are presented as one energy expressed at different pitches, which means the Shadow contains the whole of the Gift and the whole of the Siddhi already. Constriction in the twenty-fifth Gene Key is not the absence of universal love; on this account it is universal love at a low frequency, contracted by fear.
Rudd's stated method follows from this. He asks for contemplation rather than effort: sustained, repeated, undirected attention to the material of a Shadow, held without an agenda to change it. The claim is that frequency rises of itself under attention, and that any attempt to force the movement is the Shadow operating on itself. The system does not offer exercises, targets or stages of progress.
Two things are worth observing about this design. It is unfalsifiable in practice, since no outcome within it counts as failure; slow progress and no progress are described in the same terms. And it is structurally kind, in that it gives a reader no way to score badly, which is a large part of the system's appeal and is presumably intended.
The vocabulary is worth dating too. Siddhi is a genuine Sanskrit term from Indian religious literature, where it denotes attainments arising from advanced practice. Its application to a set of sixty-four hexagram positions is Rudd's, made in the first decade of this century, and has no precedent in either the Indian or the Chinese tradition.