Hi Sarajoy,
I would say that your intense visual experiences are occurring because you're already predisposed to such symbolism and altered states. I would guess that the entrainment in level 1 is holding you in a rather consistent brainwave pattern, and allowing your natural skill for symbols to emerge in a more cohesive state.
That's my guess anyway. BrainEv has certainly sharpened my own capacity to regulate my mental states, enhancing my meditations (without entrainment). When I shift myself into alpha or theta, I feel a greater stability and endurance. When I do my sessions, the mental control I would usually exercise in meditation goes into an automatic mode, and I can literally "feel" myself sync with the audio entrainment, and can move around the prime and major tiers in the audio. Sometimes I can feel the minor tier, but not always. However, now that I'm in level 2, the minor tier has been a lot easier to track.
So whatever your natural propensity is, I would say, BrainEv does enhance.
I hope this provides some insight.
Best regards, Robert