Evolution Fist,
It's not so much a regression or a step backward or whatever. This is a lost, for the most part, part of human conciousness that served us in the past, and many believe that it should not be lost. Have you ever heard the phrase "backwards down the path"? It's not going back forever, just retracing one's steps (up the evolutionary ladder) to familiarize oneself with who and what one is, and where one comes from. Such knowledge is necessary to evolve to one's full potential.
The Internal arts aid us in personal evolution, helping us to achieve our full potential, and that is why mental and analytical facilities seem enhanced...because they are. Generally, people who reach the internal are people with a higher conciousness, who have evolved a bit further than others. (This is on a personal scale.) People who have evolved further can allow themselves to regress at certain times with no fear that they will not come back. People who are not that evolved or are not that "civilized" need not regress at all, though if they do, they are the ones who seem to actually "downgrade."
Resorting to the reptilian impulse is not a 24/7 thing. It is something we condition ourselves to do to give us a higher chance of survival. It is base, it is ugly, it is savage, brutal and violent...but it is a part of ourselves we cannot deny. You can wear colored contact lenses, but you cannot deny the true color of your eyes. No matter how many different pairs of contacts you wear, they will still be the same color beneath. Some people like to use the mask analogy, saying that if you wear a mask for long enough, it becomes your face. That is true, but beneath the mask, you are still the same, and beneath the human skin you are still an animal.
The reptilian part of our conciousness is a link to instincts and knowledge that have long been disused. As an example of what I mean, let's say that far in the future industrialization has destroyed much of the landscape and rainfall is harmful to humans, sometimes deadly if they cannot get in out of it. So humans develop enclosures in which they spend almost their entire lives. Eventually, they forget about the poison rain, having spent entire generations inside. Now let's say that four people venture outside on an overcast day, and it begins raining. One person, having not evolved very far, still possesses the instinct to jump back into the enclosure, and promptly does so. Two of the people just stand there like idiots until they realize that the rain is melting their flesh off, and run around not knowing what to do. They die. The fourth person simply pulls out an umbrella as he sees the first drops of rain fall, goes about his business whistling a tune perhaps, and when the rain stops he looks around to see two puddles of ex-humans and one cowering primitive as he furls his umbrella back up. The cowering primitive, though he hasn't lost the life saving instinct, hasn't evolved far beyond it, and never might. The two puddles who were once humans, evolved beyond the instinct and lost contact with it, so much so that they could not draw upon it in a time of need. The fourth, who drew an umbrella, had not lost the instinct, but had evolved beyond it, and yet maintained contact with it so that he could utilize it in time of need without remaining a primitive.
Phoenix,
Have you ever explored the levels of human conciousness through the medium of the Enochian Keys, as in guided meditation? Have you ever played recordings of the Enochian Keys in the background during your practice? If not, might I recommend no's 1, 3, and 8? They are the ones for gathering power. Anyway, sounds like you are headed in a productive direction, and I would suggest definitely researching the Owl more. Sounds like a definite power animal for you. Also, do you use natural incenses, like tobacco, in your rites, or do you use specific scents? Have you tried combining your ritual exploration of the animals with more animalistic scents like musk, patchouli, etc?