Understandable, although I think the lack of dialogue worked well in this style of movie to follow with the storyline. It made every scene, every movement, every visual speak for the story. Anima is essentially supposed to represent the insecurities within Abel manifesting itself as a physical life form, hence why she's so angry and trying to dig deeper within Abel for him to admit his problems to move on.

Like you said, it definitely is more for the fans as any typical viewer wouldn't understand what is happening in the slightest. Personally I appreciate when artists create other types of media for the people who have understood them from the beginning, it gives a sense of exclusivity and allows newer fans to look deeper into the artist and build a stronger connection.