I for one, am really interested. I’d like to have everything you described on your first post.
BTW: I also use Moon+Reader and love its annotation features: I use several colors and several underline and highlight styles, each one with its own meaning (squiggly blue doesn’t mean the same as squiggly red, which are totally different from straight line blue). It is perfect for people who like to really dissect a text.
If I had that AND the linking capabilities of Obsidian, I’d finally be happy.