I agree with you on the Buddha-existing thing, though the debate doesn't interest me.
However, on the Lotus Sutra... look, I know a little about shamanism and reading texts in altered states; I am a poet after all. Don't think what you're saying is revelatory.
But if you can call up those states, try reading this, because it's good, deep, wise, powerful, compassionate, well-wrought. All the things the Lotus is not:http://www.angelfire.com/tn/plath/ariel.html