With all the flaws in this idea here presented, and skillfully attacked by those who think it wooey nonsense, it still is an interesting concept, and a plausible alternative to both physicalism and standard religiousity. I don't buy it, but it is worthy of at least some consideration as a possibility among many.
Could you specify the flaws? Also, with due respect to others, I don’t think the idea was “skillfully attacked.” I got more of a sense of pre-emptive dismissal and a kind of knee-jerk invocation of “woo” charges. In fact, even if analytic idealism is wrong, it most definitely is not “woo.” A coherent metaphysics that is not obviously contradicted by evidence is never woo, even if one were to argue that there is little or no evidence in favor of it (and Kastrup argues that there is such evidence). If that were the case, then you can also write off the quantum multiverse and string theory, to take two obvious examples, as “woo.”
I had hoped that others would read the paper and address it, after I summarized the argument. Maybe some did, but I didn’t get much sense from those who reacted negatively that they had in fact read the paper.
As to the ego death thing, is is not woo either. Kastrup did not formulate his idea because of psychedelics — far from it — but he, as welll as many others, reports the subjective experience of ego death in these circumstances and a feeling of “oneness” with nature. These kinds of experience under different circumstances have been reported since antiquity. Analytic idealism points to the possibility that since everything is phenomenal, some kind of subjective experience may survive death even if it is not the “I” experience of the ego.