You realize the enneagram is basically a modern derivative of a system developed by Sufi Muslims, which is a muslim derivative of whirling dervishes, which are basically arabic shamans which would whirl around in a circle as part of a mystical dance to reach an entranced state which would allow them to be "enlightened".

The concept of transitions and cycles about a circle makes perfect sense in this context imo. I think the dynamics of the enneagram are very interesting and useful.

Also let me say, I don't think dynamics are the same thing as lacking a "core type" or "identity". They are just a way of understanding the ebbs and flows of that core identity.