Answer

Hello,
Hasidism does not speak to me. My impression is that usually these are vague ideas and concepts that are not well defined, and that creates a feeling of depth. Of course, here and there there are also beautiful things, as is the way of Torah.
Although, because these writings are very associative and vague, you can do almost whatever you want with them. So in the end, it depends on the lecturer. If he himself is a deep and interesting person, then it does not really matter in whom or in what he anchors his words (roughly like interpretation of poetry or literature). So I assume one can find good lectures on Hasidic writings, and usually the “credit” for their being interesting and useful belongs to the lecturer and not to the writings themselves. Therefore it is also worth paying attention to how much of what they say is really in the text, or whether it is their own invention (which is completely legitimate). Especially since, as Hasidim, they tend to see everything as already being in the text, and if there is something good in what they say, it is certainly taken from there. Breslov Hasidim assume that everything is found there, and likewise followers of Rabbi Tzadok, the Maharal, Rabbi Kook, and the like. In many cases, the lecture gives the text a new face or interprets it in a way that was not really its intention. If he is talented, he will always manage to show you with signs and wonders that his words are in the text (that is how people find relativity and quantum theory in the Zohar and in the writings of the Ari, and so on). Truthfully, none of this is all that important, since the ideas should be examined on their own merits, and what difference does it make whether this was Rabbi Nachman’s intention or Rabbi Kook’s or not? But as someone with a critical mindset, it is still worth noticing this.
You can see my nuanced opinion about Rabbi Shagar’s writings in a recorded YouTube lecture (from the evening marking the publication of his book Tablets and Broken Tablets), which also appears here on the site:

על כלים ושברונם – על כלים שבורים