STORM works best as a legal thriller (I'm a criminal lawyer). Its depictions of witnesses, evidentiary rules, discussions with opposing counsel, etc., are done very well. STORM's acting, dialog, shooting and direction are done professionally and convincingly; e.g., the film never drags and, until the end, there's nothing that drags or takes one "out of the film". The intertwining of the political influences is also done well. It should be made clear that while the Balkans tragedy serves as the vehicle for STORM, this is not a movie about those horrors in particular; i.e., the same film may have made using a different conflict.
Having said so much, STORM lacks passion. Its as if a talented group of people were tasked with making the movie, put in many hard days, then went back to pursuing what they truly loved. The lack of passion may result from STORM's lack of evil clearly depicted villains; i.e., stuff which arouses viewers. Indeed, hardly any background or time is given the Defendant in the docket for the entire film. The horrific scenes of the crimes involved are not seen but provided via the courtroom testimony. I understand that such may be precisely what the makers of STORM wanted to do; i.e., not be explicit to highlight the routine and tedium of legal work. If so, they succeeded. Maybe too well.